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PROSTATODYNIA
& PROSTATITE
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Authored
by Richard A Watson, MD, Program Director, Associate Professor, Department
of Surgery, Division of Urology, University of Medicine and Dentistry
of New Jersey
Coauthored by Robert J Irwin, Jr, MD, Chair, Harris L Willits Professor,
Department of Surgery, Division of Urology, University Hospital, University
of Medicine and Dentistry of New Jersey
Richard A Watson, MD, is a member of the following medical societies:
Academy of Medicine of New Jersey, American Urological Association, Association
of Military Surgeons of the US, and Society of University Urologists
Edited by Edward David Kim, MD, Associate Professor, Department of Urology,
University of Tennessee School of Medicine; Francisco Talavera, PharmD,
PhD, Senior Pharmacy Editor, eMedicine; Shlomo Raz, MD, Professor, Department
of Surgery, Division of Urology, University of California at Los Angeles
School of Medicine; J Stuart Wolf, Jr, MD, Director of Michigan Center
for Minimally Invasive Urology, Associate Professor, Department of Urology,
University of Michigan Medical Center; and Stephen W Leslie, MD, FACS,
Founder and Medical Director of the Lorain Kidney Stone Research Center,
Assistant Clinical Professor, Department of Urology, Medical College of
Ohio
INTRODUCTION
Background: The term prostatodynia or chronic pelvic pain syndrome (CPPS)
is used loosely to designate any unexplained complaints of chronic pelvic
pain associated with the following 2 characteristics in a male patient:
1. Nonspecific voiding symptoms and/or pain located anywhere in or around
the groin, genitalia, or perineum
2. The absence of pyuria and bacteriuria, with or without excess white
cells or bacteria on Gram stain and culture of expressed prostatic secretions
(EPS)
An academic distinction may be made between patients with excess WBCs
in their prostatic secretions (chronic nonbacterial prostatitis) and those
with normal prostatic secretions (prostatodynia), but these 2 conditions
are inseparable in terms of symptomatology and lack of an effective, definitive
treatment.
Frequency:
- In the
US: Chronic prostatitis is the most common urological diagnosis in men
older than 50 years and is the third most common diagnosis in men younger
than 50 years. This diagnosis results in at least 2 million office visits
per year. The average urologist sees about 10 prostatitis patients per
month, of whom 30% are new patients. Specific urinary pathogens are
detected infrequently on culture. The vast majority of these patients
are categorized as patients with chronic nonbacterial prostatitis or
prostatodynia, otherwise known as CPPS in the male.
Age: Chronic
prostatitis most commonly affects men older than 50 years. It is only
slightly less common in men younger than 50 years.
CLINICAL
History:
- Symptomatology
parallels that experienced in chronic bacterial and nonbacterial prostatitis.
- The typical
patient is a young-to-middle-aged man with variable complaints of chronic,
irritative, and/or obstructive voiding symptoms accompanied by moderate-to-severe
pain in the pelvis, lower back, perineum, and/or genitalia.
- Erectile
dysfunction is the symptom that initially brings many men to seek medical
attention; however, the patient often will wait until the end of the
interview to mention the problem, or he may avoid mentioning it at all
unless the physician specifically inquires.
- To facilitate
history taking and to establish a more uniform standard, a National
Institutes of Health (NIH) collaborative panel has proposed an NIH Chronic
Prostatitis Symptom Index (NIH-CPSI). This index is comprised of a series
of 9 questions that contain 21 items to assess patient history in a
standardized and quantifiable format.
1. Pain
or discomfort (4 questions)
2. Urinary symptoms (2 questions)
3. Impact of symptoms (2 questions)
4. Quality of life impairment (1 question)
- The NIH
describes 4 categories of prostatitis, described below.
Table 1.
Four Categories of Prostatitis Established by the NIH
| Type
|
Description |
| Type
I |
Acute
bacterial prostatitis |
| Type
II |
Chronic
bacterial prostatitis |
| Type
III |
Chronic
abacterial prostatitis (CPPS)a) Inflammatory CPPSb) Noninflammatory
CPPS |
| Type
IV |
Asymptomatic
inflammatory prostatitis |
Physical:
- No finding
is pathognomonic.
o Examination
of the genitalia reveals normal results.
o Digital rectal examination may reveal a tight anal sphincter.
o The prostate and adjacent tissues may be moderately to severely
tender, and the gland itself may be slightly congested or boggy.
- The
value of this examination is to rule out other diagnoses, such as
prostate cancer, chronic urethritis/meatitis, and granulomatous prostatitis.
Causes:
- Bacteria:
Ureaplasma urealyticum and Chlamydia trachomatis have been implicated
as possible etiologic agents by some but refuted by others.
- Neuropathy
o Findings
on video-urodynamics of spastic hyperactivity in the absence of
a definable underlying neuropathy suggest the presence of either
an occult neural etiology or an acquired functional voiding disorder.
o Myofascial pain syndrome has been postulated as a cause for CPPS/chronic
prostatitis.
Even in the
face of clinical inflammation, a reflex triggering of spasm in the musculature
of the pelvic floor can be the secondary, but clinically significant,
source of much of the symptomatology (Zermann, 1999).
DIFFERENTIALS
Acute Bacterial Prostatitis and Prostatic Abscess
Appendicitis
Bladder Cancer
Bladder Stones
Carcinoma-in-Situ of the Urinary Bladder
Chronic Pelvic Pain
Condyloma Acuminatum
Cystitis, Nonbacterial
Enterobacter Infections
Enterococcal Infections
Fistula-in-Ano
Gonococcal Infections
Hematospermia
Infertility
Infertility, Male
Interstitial Cystitis
Nonbacterial Prostatitis
Perianal Abscess
Prostate-Specific Antigen
Prostatic Intraepithelial Neoplasia (PIN)
Prostatitis, Bacterial
Prostatitis, Tuberculous
Proteus Infections
Pyelonephritis, Chronic
Radiation Cystitis
Schistosomiasis
Tuberculosis
Tuberculosis of the Genitourinary System
Urethral Cancer
Urethral Diverticula
Urethral Diverticulum
Urethral Strictures
Urethral Syndrome
Urethral Trauma
Urethral Warts
Urethritis
Urinary Tract Infection, Males
Urinary Tract Obstruction
Other
Problems to be Considered:
Other conditions in the differential include the following:
Tuberculous prostatitis
Sexually transmitted diseases
Congenital or acquired abnormalities of the urethra
Prostatic cyst
Prostatic abscess
Seminal vesiculitis
Myofacial pain syndrome
These many
differential diagnoses-and this list is by no means exhaustive-reveal
the conundrum of diagnosing prostatodynia. Because the diagnosis is one
of exclusion, in theory, this diagnosis cannot be made until all of these
alternatives have been excluded definitively. However, neither time, patience
(the physician's and the patient's), nor the limited medical resources
and/or the patient's finite finances allow for a categorical demonstration
of the absence of each of these symptomatically related entities.
An archetypical
example would be making a distinction between prostatodynia and interstitial
cystitis in the male. A detailed review of the diagnosis of interstitial
cystitis is presented thoroughly in Intersitial Cystitis. Suffice it to
say here that the distinction between prostatodynia and interstitial cystitis
is particularly challenging, in that both of these conditions are diagnoses
of exclusion-2 separate "waste-can" diagnoses. Just as no definitive
diagnostic test exists to document the diagnosis of prostatodynia, so
too no test proves unequivocally the presence (or absence) of interstitial
cystitis. If cystoscopy is planned as part of the workup, performing this
study under anesthesia and including biopsy and hydrodistention, searching
for telltale signs, is prudent and cost effective. However, the pathognomonic
Hunner ulcer is as rare as it is classic. And the presence of glomerulations-not
always an all-or-none
observation-has been described in asymptomatic women. At the most recent
(2001) convention of the American Urological Association, no fewer than
3 reports disparaged the utility of the once heavily promoted potassium
sensitivity test.
The point
at which the physician empirically recommends (for a given patient with
prostatodynia) a trial of therapies specific for interstitial cystitis
is the physician's judgment call. Therapies such as Elmiron (pentosan
sulfate) and intravesical instillations of dimethyl sulfoxide (DMSO),
for example, have yielded success in selected patients with prostatodynia.
Details regarding the array and application of various interstitial cystitis
therapies are beyond the scope of this chapter (see Intersitial Cystitis).
Nonetheless, the frustrated diagnostician should keep this option for
diagnosis in mind when further evaluating a patient with refractory prostatodynia.
Similarly,
other diagnoses also must be excluded. Most importantly, any risk of underlying
cancer must be dealt with urgently. Transitional cell cancer and carcinoma-in-situ
of the bladder are deadly masqueraders. Cancer of the prostate also can
present with symptoms suggestive of prostatodynia. Neoplasms of the rectum
and GI tract, as well as rare tumors of other pelvic organs, have made
their presence first known via irritative prostatic symptoms. Benign prostatic
hyperplasia (BPH) and obstructive uropathy also have presented in this
manner (see Prostate Hyperplasia, Benign). All of these possible diagnoses
must be considered when diagnosing prostatodynia.
Ignoring
these possibilities in all prostatodynia patients eventually would prove
to be a fatal mistake. However, to subject every patient to a physically
and financially exhaustive gauntlet of tests and procedures also clearly
would be inappropriate. Tailoring the diagnostic workup to meet the needs
of a specific patient is a skill that defies textbook codification. The
'art' of medicine comes into play in deciding, together with the patient,
which possibilities to pursue and how vigorously to pursue each of them.
WORKUP
Lab Studies:
- Urinalysis
and culture
o No
litmus test for CPPS exists.
o The presence of pyuria and/or bacteriuria supports a diagnosis
of bacterial prostatitis.
o The presence in the EPS of an inordinate number of white cells
and/or bacteria on Gram stain and/or a heavy, nearly pure growth
of a known bacterial pathogen on culture indicates a diagnosis of
bacterial prostatitis. However, contamination from the urethra,
from an external site, or from a source of infection in the upper
urinary tract can lead to a false-positive result, while errors
in collection or processing can lead to a false-negative result.
o Stamey recommended the 3-glass urinalysis method, and, while this
approach is widely taught, it is much less widely practiced by clinical
urologists today. (See Prostatitis, Bacterial for a detailed description
of this examination.)
- Prostatic
specific antigen
o Prostate-specific
antigen (PSA) often is elevated in acute bacterial prostatitis,
and it may be modestly elevated in chronic prostatitis as well.
o PSA testing in men with CPPS symptoms may be helpful in distinguishing
between those with chronic bacterial prostatitis (elevated PSA)
and those with prostatodynia (PSA within the reference range); however,
this theory has yet to be tested in a well-controlled clinical trial.
o Testing this theory presents problems because it involves counseling
large numbers of men younger than 40 years with an elevated PSA
secondary to benign inflammation to reassure them that their test
results are not a positive cancer test.
Imaging Studies:
- Because
no definitive diagnostic finding exists, all radiological studies (kidneys,
ureters, and bladder [KUB]; intravenous pyelogram [IVP]; videocystourethrogram
[VCU]; CT scan; MRI; ultrasound of the scrotum; and transrectal ultrasound
of the prostate) are aimed at excluding the presence of other, more
definable and treatable causes of the patient's symptoms.
- None of
these studies warrants universal application.
- A cost-effective
diagnostic algorithm should be individualized for each CPPS patient,
incorporating only those laboratory tests and radiographic procedures
that are appropriate to that specific patient's problem.
Procedures:
- Prostatic
massage (diagnostic) and 3-glass urinalysis
o Massage
of the prostate produces EPS.
o The finding of high colony counts of bacterial pathogens and/or
the finding of a significant excess of WBCs suggests the presence
of a treatable infectious agent, particularly if these findings
can be reproduced on a second massage.
o Because eliminating the presence of urethral contaminants from
these specimens is impractical, the clinical reliability of these
findings is subject to challenge.
o Most men find this process distinctly unpleasant, and many tolerate
the procedure with great difficulty, if at all.
o In many cases, no prostatic secretion flows from the meatus after
massage. In these cases, Stamey recommends obtaining the first 10
cc of voided urine immediately following massage, a voiding bladder
urine #3 (VB3) specimen, and submitting that specimen for Gram stain
and culture as a substitute for the EPS.
- Video-urodynamics
o Video-urodynamic
evaluation often reveals a spastic dysfunction of the bladder neck
and prostatic urethra.
o Incomplete relaxation of the bladder neck and abnormal narrowing
of the prostatic urethra occur on voiding views.
o These findings alone might not clearly justify the expense and
discomfort of undergoing the procedure.
o The main role of urodynamic studies is to rule out another underlying,
unsuspected, but well-defined neuropathy amenable to treatment.
- Flow rate
o A
formal flow rate study often may document intermittency of flow
and weakening of the urinary stream with a diminished peak urinary
flow rate.
o The urethral pressure profile typically shows a high maximum urethral
closing pressure.
- Cystoscopy
o Though
the study results may be entirely normal, cystoscopy at most will
reveal only nonspecific findings of minimal-to-mild inflammation
and congestion in the area of the trigone and prostatic urethra.
o The main purpose of this intervention is, as with uroradiography,
to rule out the presence of other causes of the patient's symptoms.
- Flexible
cystoscopy can be performed on an outpatient basis after urethral injection
of Xylocaine jelly; however, in performing cystoscopy under general
or regional anesthesia to evaluate these patients, 3 considerations
exist.
1. These
patients tend to be, as a rule, somewhat high-strung and hypersensitive,
with a low pain tolerance. When the patient is unable to cooperate
fully, endoscopic inspection is compromised.
2. General or regional anesthesia allows for more comfortable performance
of cold-mucosal cup biopsies to rule out carcinoma-in-situ (CIS) and
for hydrodistention of the bladder to rule out interstitial cystitis.
3. Minor pathology, such as an annular stricture of the urethra or
a prostatic polyp, can be treated at the same time.
- Anal sphincter
electromyography (EMG) and/or sphincter function profiles (microtip
catheter) record reflex reactivity during cystometrography (CMG) and
indicate the presence of hypertonicity and failure of the pelvic floor
musculature to relax-signs of an underlying myofacial pain syndrome.
Overall pelvic floor activity during CMG also can be monitored by an
intra-anal surface electrode. While such experimental evaluations are
not yet part of the standard urological armamentarium, they are available
at select centers (Zermann, 1999).
TREATMENT
Medical Care: Managing a patient with CPPS challenges even the most compassionate
physician. The patient often is understandably tense, wary, and defensive.
Most patients already have encountered frustration and rejection under
the care of several unsympathetic physicians. These patients often approach
new physicians with an off-putting combination of unrealistic hopes for
a cure and suspicion related to past diagnosis and treatment failure.
The patient and physician must agree mutually upon a workable relationship
at the outset of treatment. Below are 11 points the urologist and patient
may wish to address, perhaps approaching treatment as a contractual agreement.
1. CPPS
is a well-established condition notorious for the pain and disability
it causes.
2. CPPS is a condition, not a disease or syndrome. It is similar to
other chronic conditions, such as arthritis, that while treatable, are
not curable. No known cure exists for CPPS, but treatments that are
based on the cooperation of patient and physician make this condition
more bearable. Over time, this condition possibly will improve or stabilize
on its own.
3. Because CPPS is a diagnosis of exclusion, the physician must review
the patient's records and perform a thorough physical examination to
eliminate the possibility that another more treatable disease is causing
these symptoms. The physician should assure the patient that only those
diagnostic tests that hold a reasonable chance of producing a significant
result will be recommended. The patient should not rule out the possibility
that these examinations may reveal an alternate diagnosis, but he also
should not be burdened by excessive testing.
4. Many medications and other forms of treatment can help alleviate
the symptoms of CPPS. However, being patient is important; try only
1 or 2 new treatments at a time, giving each enough time to take effect.
The physician should not overwhelm the patient with an unreasonable
number of treatments carried out simultaneously, which will only cause
excessive inconvenience and expense. Simultaneous treatments actually
might work against one another, and the chance exists that the side
effects of these treatments might cause more, rather than less, problems
for the patient.
5. The physician should reassure the patient that CPPS is a real physical
condition; the problem is not imagined. However, this devastating problem
causes many psychological stresses for the patient. The physician should
suggest medications to help calm the patient, as well as consultation
with a psychiatrist or psychologist. A mental health care professional
who has a special interest in this area may prove beneficial.
6. The patient should be reassured that CPPS is a legitimate condition,
and, more importantly, it is not cancer. This condition is not life
threatening, it is not a venereal disease, and it is not contagious.
The physician should explain that the patient did not acquire this condition
from someone else nor will he pass it on to anyone.
7. The physician must remind the patient that he is not alone. Many
men experience this problem. Local and national support groups recommended
by the physician can provide additional information and encouragement.
8. Doctor and patient should agree upon a schedule of planned follow-up
visits carried out on a regular basis as frequently as appropriate management
of symptoms dictates. These scheduled appointments will minimize the
need for emergency visits and telephone calls while providing comfort
and creating trust between doctor and patient.
9. The urologist will carry out treatment through, and in close communication
with, the patient's primary care physician who will remain the mainstay
of care.
10. The patient should be reminded that he is free to seek the advice
of other physicians and health care providers while he is under a urologist's
care. However, the patient must keep the urologist informed of all other
treatments and medications tried, including alternative medicines and
home remedies.
11. The patient should be reminded that his problem is taken very seriously,
and the physician will make every effort, with the patient's cooperation,
to reduce to a minimum the problems that this condition causes. The
patient-physician relationship should be a partnership formed to gain
control of this condition and allow the patient to enjoy life more fully.
- Prostatic
massage (therapeutic)
o The
role of prostate massage in providing symptomatic relief is controversial.
o With little evidence-based medicine to commend it, regularly repeated
prostatic massages have been recommended in the past, particularly
for patients with a large, congested gland.
o Some patients do find that it provides them temporary relief worth
the awkwardness and discomfort of the maneuver itself.
o In 1969, Winter recommended prostatic massage 1-3 times weekly for
3-4 weeks for chronic infection of the prostate.
o Although this maneuver has largely fallen out of favor with many
contemporary urologists, some still do revert to it, albeit on a less
exuberant schedule, to provide supplementary symptomatic relief for
select patients.
- Therapeutic
ejaculation
o The
role of frequent ejaculation in either producing or reducing CPPS
symptoms remains controversial.
o Patients with enlarged, symptomatically congested glands often
are advised that regular sexual intercourse may alleviate their
symptoms.
o While little objective evidence substantiates this claim, most
patients do find this recommendation more attractive than serial
prostate massages by their local urologist.
o Whether frequent sexual intercourse relieves or actually exacerbates
the condition seems to vary idiosyncratically from patient to patient.
o Many patients enjoy informing their wives that the doctor prescribed
frequent sex as therapy, and opportunities for amusement are few
when dealing with this issue.
o This author's anecdotal observation is that patients tend to be
most adversely affected by sudden, dramatic changes in the frequency
of intercourse, either increase or decrease. For example, a patient
who remains sexually chaste while on prolonged business trips is
apt to experience a flare-up both when he leaves home and again
when he returns.
o Whether masturbation produces an effect comparable to that of
intercourse remains as unproved as it is widely advised. Ironically,
similar prostatic maladies were attributed in 19th-century medicine
to an excess of masturbation; what was condemned as a cause in the
1800s, has been promoted in the 20th century as a cure. Physicians
should approach recommending masturbation in a sensitive manner,
with the awareness that the act is objectionable to some patients'
moral and religious standards.
Surgical
Care: For instances of severely disabling CPPS, transurethral resection
of the prostate (TUR-P) and even radical prostatectomy have been undertaken.
A widely held opinion among urologists is that transurethral resection
should be reserved for those who have experienced extreme, persistent
symptoms over a protracted period of time, with no relief from nonoperative
interventions. When TUR-P is undertaken, completing a thorough resection
of all tissues, down to the capsule, is important. The concern is that
residual tissue, partially coagulated, with obstruction of the ductal
drainage from prostatic acini might create even worse symptoms (Smart,
1975).
Radical prostatectomy is an extreme measure, which should be entertained
only in the most desperate of cases, if at all (Davis, 1990).
Consultations:
- Pain management
consultation
o Anesthesiologists
and other experts in pain management sometimes can assist importantly
in providing significant symptomatic relief.
o No analgesics specifically are appropriate to the treatment of
prostatitis. Standard mild analgesics, such as Tylenol, aspirin,
and ibuprofen, are well within the purview of the urologist's (and
indeed the primary care physician's) domain of management. Be mindful
that your patient's analgesic needs are likely to fluctuate. Often,
encouraging your patient to maintain a chronic, low-level intake
of a minor analgesic, such as acetylsalicylic acid (ASA) or Tylenol
tid, will diminish his need for more potent analgesics.
o Both patient and physician fear of analgesic abuse or addiction
often have led to under-medication, causing unnecessary pain and
suffering.
o Be quick to invite consultation from an established pain management
center. Clinicians at Washington University have documented the
beneficial impact that a coordinated, multidisciplinary approach
between the urologist and the pain management team can have on improving
the quality of life for many of these patients. These patients are
dismissed often too easily, and their complaints are trivialized.
Symptomatic patients can be encumbered by pain as devastating as
that experienced by cancer patients, neurological patients, and
others with debilitating conditions who merit a vigorous approach
to the effective management of their pain.
- Psychiatric
consultation
o It
frequently, if only anecdotally, is observed that patients with
CPPS tend to be tense, high-strung, hypochondriacal, and even neurotic.
o Experiencing the daily torment of uncontrolled pelvic pain, urinary
dysfunction, and social embarrassment often causes psychological
sequelae.
o Many patients encounter frustrated, dismissive, and unhelpful
physicians in the course of treatment, which is discouraging.
o If the physician presents a sympathetic, constructive attitude,
it can do much to alleviate the strain on the patient (see Medical
Care).
o Moreover, a mild relaxant, such as Valium, that is prescribed
judiciously may help the patient to adjust to his condition and,
at the same time, relax the spasm of the pelvic floor muscles, providing
objective relief as well.
o Psychiatric medications should be prescribed with caution and
rarely without consultation with a psychiatrist.
o A psychiatrist who is particularly interested in helping these
patients can be a valuable member of the treatment team that includes
the primary care physician, the urologist, and the pain management
experts.
o Avoiding a misunderstanding when recommending psychiatric counseling
is important because the patient may perceive that his physician
suspects that he is insane, hysterical, or delusional.
o Reassure the patient that his condition is real and that his suffering
is not imaginary.
o Psychological support is appropriate in helping the patient cope
more effectively with his serious, real-life problem.
- Andrology
consultation (management of erectile dysfunction)
o While
erectile dysfunction and its remedies are discussed in detail in
another chapter (see Erectile Dysfunction), the physician must remember
that managing this potentially devastating effect of CPPS can have
a highly positive impact on the patient's attitude and enjoyment
of life.
o Many remedies and treatments are available, including sildenafil,
vacuum devices, injection and intraurethral therapies, and penile
implants; a physician would be profoundly remiss not to broach the
topic and its treatment possibilities.
o Involving the patient's wife in the discussion early in treatment
can be very worthwhile.
- Physical
medicine and physiatry consultation
o Lately,
authorities have appreciated that, in many cases, the symptoms formerly
attributed to "prostatodynia" actually may reflect pelvic
floor spasm and chronic pelvic pain that is not prostatic in origin.
In light of this, physiotherapists may provide an important role
in helping to distinguish diagnostically and to ameliorate therapeutically
those symptomatologies that are neuromuscularly based. For example,
patients with palpable myofascial tenderness in the rectal area
often experience a chronic inability to relax their pelvic floor
musculature. This dysfunction of the pelvic floor muscles-levator
syndrome-is objectively documentable. Moreover, significant symptomatic
relief has been achieved through modulation-based therapies such
as biofeedback, alpha-blockers, and sacral nerve stimulation.
o Clinical researchers at Columbia University have found that an
important subset of patients who had been treated unsuccessfully
for symptoms of chronic abacterial prostatitis for 1.5 to more than
10 years and who were unresponsive to long-term antibiotics and
alpha-blockers actually were experiencing pseudodyssynergia (a contraction
of the external sphincter during voiding). This condition was documented
by EMG and fluoroscopy. Patients thus identified responded to treatment
with biofeedback and behavior modification in 83% of cases.
o The presence of documented inflammation of the prostate and urethra
does not rule out the presence of neuromuscular spasm of the pelvic
floor. Whether the spasm comes first, resulting from dysfunctional
voiding in subsequent urinary infections, or the infection comes
first, triggering a chronic cycle of pain and pelvic spasm, is a
chicken-or-egg conundrum. In either case, both the infection and
the spasm must be treated concurrently to achieve long-term relief
in these difficult cases.
o While the urologist is best suited to address the prostatic inflammation,
coordination of care with an interested physiotherapist for the
management of biofeedback and nerve-root stimulation may prove very
worthwhile.
Diet:
- The influence
of diet on this condition is variable.
- Traditionally
these patients have been warned to avoid excessive intake of prostate
irritants, such as coffee, tea, soda (cola drinks and diet drinks may
be especially irritating), spicy foods, and alcohol.
o The
physician should clarify that none of these items is known to cause
actual physical damage or to worsen the long-term prognosis.
o Nevertheless, responsible limitation of these items may help to
control the day-to-day symptoms.
- A glass
or two of wine or sherry may lessen nocturia complaints.
- Alkalinization
of the urine seems to help some patients. A teaspoonful of baking soda
(sodium bicarbonate) in a tall glass of warm water taken at bedtime
may help reduce nighttime symptoms. Patients should be cautioned, however,
regarding the risk of an excessive sodium load with higher oral intakes,
especially in those under treatment for hypertension, fluid retention,
or congestive heart failure. A potassium-based alkalinizer, such as
potassium citrate (Urocit K) may prove more efficacious under these
circumstances. Stephen Leslie, MD, reports anecdotally that he has found
some patients to have very alkaline urine, which also can be irritating
and cause discomfort and dysuria.
Activity:
- Hot tub
baths
o Sitz
baths may provide partial relief from acute exacerbations.
o Rather than a shallow, perineal dip, a deep tub bath in water
as hot as can be comfortably tolerated seems to provide better overall
temporary relief and relaxation.
MEDICATION
The goal of pharmacotherapy is to reduce morbidity and prevent complications.
It must be borne in mind that no antibiotic regimen has been proven efficacious
in the treatment of chronic abacterial prostatitis. "Antibacterial
agents are neither effective nor indicated in the treatment of non-bacterial
prostatitis (see E.M. Meares, Jr, in the Bibliography). If U urealyticum
or C trachomatis is suspected, a trial treatment of antibiotics may be
considered.
In bacterial prostatitis, antibiotic therapy might be guided by culture
findings from the prostatic secretions, from the ejaculate, from a urethral
swab, or from the spun sediment of a VB3 urine. Even here, antibiotic
choice is confounded by the fact that the organisms cultured from these
sources may reflect urethral contaminants, rather than a true pathogen.
Cultures of biopsies directly from the prostatic parenchyma have proven
to be unreliable guides.
Abacterial prostatitis or prostatodynia is, by definition and by exclusion,
without a documented bacterial origin. Antibiotics should have a very
limited role in therapy for this condition. However, in desperation to
do something for the patient, multiple courses of antibiotics frequently
are prescribed, often for extraordinarily protracted periods of time.
Some patients are maintained on chronic low-dose regimens, such as 1 capsule
of Septra DS daily, and some patients experience symptomatic relief on
these regimens. Whether this is a reflection of the strong placebo effect
associated with treatment of this condition or the result of suppression
of an undetected pathogen is purely a matter of speculation.
In approaching the antibiotic option, remember that no antibiotic is free
of complications. For example, in the authors' institution, a patient
has undergone a liver and renal transplant in response to a severe reaction
to trimethoprim-sulfamethoxazole, which had been prescribed as a 1-month
course of therapy for chronic prostatitis (with a sterile urine culture)
that subsequently was shown to be the result of a missed diagnosis of
bladder neck contracture. An attitude that any treatment "can't hurt"
serves patients poorly.
The expense of these medications is not negligible, particularly when
multiple prescriptions are provided, utilizing the newest, most expensive,
wide-spectrum antibiotics.
Drug Category: Antibiotics -- As noted above, prostatodynia (CPPS in men)
should, by definition, exclude men with a proven bacteriologic etiology.
Therefore, antibiotics should not be deemed appropriate for the treatment
of this condition. However, most practitioners are inclined to attempt
at least 1 trial of long-term antibiosis. Clinical evidence, reviewing
the results of all available clinical trials, found limited validation
for the use of antibacterials, even in the face of chronic bacterial prostatitis.
The cure rates for sterilization of prostatitic secretions, even for this
more specific indication, ranged from 0-90% and correlated poorly with
symptomatic responses. Limited evidence from retrospective studies suggests
that quinolones (Cipro/Levaquin) may be more effective than trimethoprim-sulfamethoxazole
(Bactrim/Septra). However, in the absence of a well-documented bacteriologic
indication, this recommendation must be weighed against the significant
cost differential between these 2 options.
The comment often is made, with regard to a blind trial of antibiotics
for prostatodynia, that the antibiotics could not hurt. As a grim reminder
of the rare, but devastating consequences attendant to the casual use
of such antibiotics, this author currently is consulting in the management
of a patient who is experiencing life-threatening complications following
a liver/kidney transplant that was necessitated by his extremely adverse
reaction to a course of trimethoprim-sulfamethoxazole. Tragically, the
symptoms of chronic prostatitis, for which this antibiotic was prescribed,
were later proven to be manifestations of a bladder neck contracture,
not of prostatitis at all.
| Drug
Name |
Minocycline
(Dynacin, Minocin) -- Treats infections caused by susceptible gram-negative
and gram-positive organisms, in addition to infections caused by
susceptible Chlamydia, Rickettsia, and Mycoplasma. |
Adult
Dose
|
100
mg PO bid ac for 14 d |
| Pediatric
Dose |
<8
years: Not recommended>8 years: 4 mg/kg initially, followed with
2 mg/kg q12h |
Contraindications
|
Documented
hypersensitivity; severe hepatic dysfunction |
| Interactions |
Bioavailability
decreases with antacids containing aluminum, calcium, magnesium,
iron, or bismuth subsalicylate; in women, can decrease effects of
oral contraceptives, causing breakthrough bleeding and increased
risk of pregnancy; tetracyclines can increase hypoprothrombinemic
effects of anticoagulants |
Pregnancy
|
D
- Unsafe in pregnancy |
| Precautions |
Photosensitivity
may occur with prolonged exposure to sunlight or tanning equipment;
reduce dose in renal impairment; consider drug serum level determinations
in prolonged therapy; tetracycline use during tooth development
(last one-half of pregnancy through age 8 y) can cause permanent
discoloration of teeth; Fanconilike syndrome may occur with outdated
tetracyclines |
Drug
Name
|
Erythromycin
(E.E.S., E-Mycin, Ery-Tab) -- Macrolide antibiotic that has the
theoretical advantage of penetrating blood/prostate barrier but
carries an increased incidence of GI intolerance. |
| Adult
Dose |
500
mg PO qid pc for 14 d |
Pediatric
Dose
|
30-50
mg/kg/d (15-25 mg/lb/d) PO divided q6-8h; double dose for severe
infection |
| Contraindications |
Documented
hypersensitivity; hepatic impairment; anuria |
| Interactions |
Coadministration
may increase toxicity of theophylline, digoxin, carbamazepine, and
cyclosporine; may potentiate anticoagulant effects of warfarin;
coadministration with lovastatin and simvastatin increases risk
of rhabdomyolysis |
| Pregnancy |
B
- Usually safe but benefits must outweigh the risks. |
| Precautions |
Caution
in liver disease; estolate formulation may cause cholestatic jaundice;
GI adverse effects are common (administer doses pc); discontinue
use if nausea, vomiting, malaise, abdominal colic, or fever occur |
Drug
Name
|
Ciprofloxacin
(Cipro) -- Fluoroquinolone with activity against Pseudomonas species,
streptococci, MRSA, S epidermidis, and most gram-negative organisms
but no activity against anaerobes. Inhibits bacterial DNA synthesis,
and, consequently, growth. Trovafloxacin (Trovan) overcomes many
of these limitations. Continue treatment for at least 2 d (7-14
d typical) after signs and symptoms have disappeared. |
| Adult
Dose |
250-500
mg PO bid for 7-14 d |
Pediatric
Dose
|
Not
established |
| Contraindications |
Documented
hypersensitivity |
| Interactions |
Antacids,
iron salts, and zinc salts may reduce serum levels; administer antacids
2-4 h before or after taking fluoroquinolones; cimetidine may interfere
with metabolism of fluoroquinolones; ciprofloxacin reduces therapeutic
effects of phenytoin; probenecid may increase ciprofloxacin serum
concentrations; may increase toxicity of theophylline, caffeine,
cyclosporine, and digoxin (monitor digoxin levels); may increase
effects of anticoagulants (monitor PT) |
| Pregnancy |
C
- Safety for use during pregnancy has not been established. |
| Precautions |
In
prolonged therapy, perform periodic evaluations of organ system
functions (eg, renal, hepatic, hematopoietic); adjust dose in renal
function impairment; superinfections may occur with prolonged or
repeated antibiotic therapy |
Drug Category:
Muscle relaxants -- Tension myalgia of the pelvic floor muscles, combined
with overall stress-related tension, can be partially relieved with use
of muscle relaxants (see E.M. Meares, Jr, in the Bibliography).
Drug
Name
|
Diazepam
(Valium) -- Benzodiazepine derivative indicated for short-term relief
of anxiety and adjunctive relief of skeletal muscle spasm. Depresses
all levels of CNS (eg, limbic and reticular formation), possibly
by increasing activity of GABA. Individualize dosage and increase
cautiously to avoid adverse effects. |
Adult
Dose
|
2.5-5
mg PO 2-4 doses per d prn |
| Pediatric
Dose |
0.1-0.8
mg/kg/d PO divided tid/qid |
| Contraindications |
Documented
hypersensitivity; acute narrow-angle glaucoma; severe or latent
depression |
| Interactions |
Increases
toxicity of benzodiazepines in CNS with coadministration of phenothiazines,
barbiturates, alcohols, and MAOIs; cisapride can increase diazepam
toxicity significantly |
| Pregnancy |
D
- Unsafe in pregnancy |
| Precautions |
Caution
with other CNS depressants, low albumin levels, or hepatic disease
(may increase toxicity) |
Drug Category:
Alpha-adrenergic blockers -- Alpha-adrenergic blockers have become a mainstay
in the symptomatic treatment of this condition (see E.M. Meares, Jr, in
the Bibliography). These agents, by relieving the secondary smooth muscle
spasm within the bladder neck and prostatic urethra, afford the patient
greater comfort in voiding. The dosage should be titrated progressively
and administered at night to minimize the main adverse effect of orthostatic
hypotension. The final dose must be individualized to meet the patient's
needs. While the antihypertensive agent has been administered to patients
already taking other blood pressure medications, coordinating the addition
of this medication with the primary care physician or cardiologist who
is prescribing the patient's other antihypertensive medications is wise.
Again, as with other medications, such as antibiotics, remember that the
use of alpha-adrenergic blockade is not approved by the Food and Drug
Administration (FDA) for the treatment of prostatodynia. One study has
suggested an advantage for alpha-blockers in combination with antibiotics,
over antibiotic therapy alone, in the treatment of chronic bacterial prostatitis.
| Drug
Name |
Doxazosin
(Cardura) -- Quinazoline compounds counteract alpha1-induced adrenergic
contractions of the bladder neck, facilitating urinary flow in the
presence of benign prostatic hyperplasia. |
| Adult
Dose |
1
mg PO qhs initially, slowly titrate dose upward to point of maximum
benefit; not to exceed 8 mg qhs |
Pediatric
Dose
|
Not
established |
| Contraindications |
Documented
hypersensitivity |
| Interactions |
Effects
decrease with coadministration of NSAIDs; effects increase with
coadministration of diuretics and antihypertensive medications |
| Pregnancy |
B
- Usually safe but benefits must outweigh the risks. |
| Precautions |
Orthostatic
hypotension is most troublesome adverse effect; edema of lower extremities,
dizziness, fatigue, and dyspnea may occur; caution in patients using
antihypertensive medications |
Drug
Name
|
Terazosin
(Hytrin) -- Quinazoline compound that counteracts alpha1-induced
adrenergic contractions of bladder neck, facilitating urinary flow
in presence of benign prostatic hyperplasia. |
| Adult
Dose |
1
mg PO qhs initially; slowly titrate dose upward to effect; not to
exceed 10 mg qhs |
| Pediatric
Dose |
Not
established |
| Contraindications |
Documented
hypersensitivity |
| Interactions |
Effects
decrease with coadministration of NSAIDs; effects increase with
coadministration of diuretics and antihypertensive medications |
| Pregnancy |
B
- Usually safe but benefits must outweigh the risks. |
| Precautions |
Orthostatic
hypotension is most troublesome adverse effect; edema of lower extremities,
dizziness, fatigue, and dyspnea may occur |
| Drug
Name |
Tamsulosin
(Flomax) -- An alpha-adrenergic blocker, specifically targeting
the A1 receptors. Has the advantage of causing relatively less orthostatic
hypotension, and it requires no gradual up-titration from the initial
introductory dosage. On the other hand, a higher incidence of ejaculatory
dysfunction exists with this medication (8.4-18.1%). |
Adult
Dose
|
0.4-0.8
mg PO qhs |
| Pediatric
Dose |
Not
established |
| Contraindications |
Documented
hypersensitivity |
| Interactions |
Cimetidine
may significantly increase plasma concentrations; tamsulosin may
increase toxicity of warfarin |
| Pregnancy |
B
- Usually safe but benefits must outweigh the risks. |
| Precautions |
Not
for use as antihypertensive drug; may cause orthostasis; avoid situations
that may result in injuries if syncope occurs; rule out presence
of carcinoma or cancer before initiating treatment |
FOLLOW-UP
Further Outpatient Care:
- Patients
should keep a prostatodynia diary that has a page for each date, divided
into the following 2 columns:
1.
A voiding diary records the time and approximate amount of each
voiding, as well as the time and amount of each fluid intake.
2. An environmental impact record details days when symptoms flare
up and days when symptoms are unusually quiescent, and it involves
every possible incidental of living, including, but not limited
to, the following:
- Type,
time, and amount of food and beverage intake
- Exercise
or lack of activity, including bike riding, long car rides, prolonged
sitting or standing
- Sexual
stimulation and whether or not it resulted in ejaculation
- Lack
of sexual stimulation
- Unusual
physical or emotional stress
- Exposure
to allergens such as animals, dust, or pollen
- Each day,
when either a marked flare-up or an unusual abatement of symptoms occurs,
the patient is encouraged to complete both columns of the diary in fullest
possible detail.
- After
a series of good days and bad days have been recorded, the patient can
review these recordings with the physician, looking for patterns in
diet, exposure, or activity that characterize either type of day.
- The idea
is to reduce those factors associated with flare-ups and to maximize
those factors associated with relief.
- This exercise
should not be undertaken with the expectation of a cure but rather with
the hope that clearer insight into some of the factors influencing the
condition will provide the patient better control over this condition.
Deterrence/Prevention:
- Until
the etiology(ies) of this condition is known, no specific strategy for
avoiding it is possible.
- This condition,
in some cases, may be the sequela of sexually transmitted disease, and,
if so, more vigorous treatment of the sexually transmitted disease and/or
more lengthy antibiotic treatment (>4 wk) for an initial bout of
acute prostatitis may reduce the percentage of those cases that progress
to a chronic, incurable state.
MISCELLANEOUS
Speial
Concerns:
- Prostatodynia,
now CPPS, is not a syndrome; it is not a discrete, narrowly defined
constellation of consistent symptoms and objective findings ultimately
traceable to a single, known etiology.
- CPPS in
the male is a catch-all category of convenience into which physicians
arbitrarily group the heterogeneous admixture of male patients who meet
3 criteria.
1.
Physicians can find no objective explanation for their multivariate,
long-standing complaints.
2. A significant number of their complaints relate to anatomical
structures located within an arbitrary radius of the prostate gland
(somewhere below the umbilicus and above the mid thigh).
3. Physicians can offer no satisfactory treatment, let alone a cure,
for their symptoms.
- Ultimately,
a cure for CPPS will be found by those who make distinctions among cases
rather than those who place all cases into one category.
o Clinical
investigators who are able to recognize within this hapless conglomeration
a discrete subset of patients whose symptoms and findings can be
proven to relate to a single, common etiologic factor will achieve
meaningful success in treatment.
o Identification of that factor and development of an effective
remedy will provide a cure for that particular subset of CPPS patients.
o In this way, multiple, individualized cures (as opposed to 1 cure)
for CPPS will be achieved progressively for one subset of patients
at a time.
- The key
to enabling this painstaking, multidirectional journey to success lies
in wider encouragement and more effective funding of well-designed clinical,
bench-top, and translational research projects.
- Public
awareness of the prevalence of this condition, its devastating effects
in terms of personal suffering, and its remarkable financial impact
in terms of work-loss, hospitalizations, polypharmacy, and endless office
visits needs far greater promotion.
- Funding
for research from both private and public sectors needs to be increased.
- The patients
experiencing this condition and the physicians who care for them must
have the courage to be more vocal in demanding higher priority in terms
of immediate care and in terms of long-term research.
Prostatitis,
Bacterial
Authored
by Edward David Kim, MD, Associate Professor, Department of Urology, University
of Tennessee School of Medicine
Edward David Kim, MD, is a member of the following medical societies:
American College of Surgeons, American Medical Association, American Society
for Reproductive Medicine, American Society of Andrology, American Urological
Association, Illinois State Medical Society, and Texas Medical Association
Edited by Jong M Choe, MD, FACS, Director of Continence and Urodynamic
Center, Assistant Professor, Department of Surgery, Division of Urology,
University of Cincinnati College of Medicine; Francisco Talavera, PharmD,
PhD, Senior Pharmacy Editor, eMedicine; Shlomo Raz, MD, Professor, Department
of Surgery, Division of Urology, University of California at Los Angeles
School of Medicine; J Stuart Wolf, Jr, MD, Director of Michigan Center
for Minimally Invasive Urology, Associate Professor, Department of Urology,
University of Michigan Medical Center; and Stephen W Leslie, MD, FACS,
Founder and Medical Director of the Lorain Kidney Stone Research Center,
Assistant Clinical Professor, Department of Urology, Medical College of
Ohio
INTRODUCTION
Background: Chronic bacterial prostatitis represents an infection
of the prostate gland. This condition must have bacterial growth in culture
of the prostatic fluid or postmassage urine specimen by definition. The
expressed prostatic secretions (EPS) usually shows greater than 10 white
blood cells per high power field (wbc/hpf) and macrophages.
The hallmark is the occurrence of relapsing urinary tract infections,
most often by the same pathogen. Chronic bacterial prostatitis is often
confused with nonbacterial prostatitis, chronic pelvic pain syndrome (CPPS)
and prostatodynia.
Pathophysiology: The prostate gland is an accessory sex gland,
providing approximately 15% of the ejaculate. The base of the prostate
abuts the bladder neck, while the apex is in continuity with the membranous
urethra, resting on the urogenital diaphragm.
The adult prostate weighs approximately 20 g, but may increase in size
dramatically with age. The approximate dimensions are 4.4 cm transversely
at the base, 3.4 cm in length, and 2.6 cm in anteroposterior diameter.
Antibacterial factors within the prostate, such as zinc, help to prevent
infection.
Frequency:
- In the
US: It is estimated that 25% of all men evaluated for urological problems
in the US have symptoms of prostatitis. Approximately 50% of men will
experience symptoms of prostatitis at some time in their life. However,
less than 5-10% of men with symptoms of prostatitis have bacterial prostatitis.
Mortality/Morbidity:
Chronic bacterial prostatitis is not associated with mortality. However,
acute bacterial prostatitis (discussed in another chapter) represents
a potentially lethal process if untreated.
The morbidity of chronic bacterial prostatitis is its relapsing nature.
Chronic bacterial prostatitis may be difficult to eradicate because of
the persistence of bacteria within the prostatic acini.
Race: No racial predilections have been identified.
Sex: Occurs only in males.
Age: Chronic bacterial prostatitis typically affects men aged 40-70
years. This age group is similar to those men who have symptoms of benign
prostatic hyperplasia.
CLINICAL
History:
Relapsing urinary tract infections, interspersed with asymptomatic periods,
are common in chronic bacterial prostatitis. While some men are diagnosed
because of asymptomatic bacteriuria, most have varying degrees of irritative
voiding symptoms, such as dysuria, frequency and urgency.
In addition, feelings of a vague discomfort in the pelvis and perineum
may be present. Fevers and chills are uncommon. The rectal palpation of
the prostate is not painful, and has no specific findings. Prostatic fluid
and postmassage urine cultures, which should be obtained for precise diagnosis,
demonstrate bacterial growth.
- Characteristics
of chronic bacterial prostatitis
o Most
common cause of relapsing urinary tract infection (UTI) in males
o Asymptomatic periods between episodes of recurrent bacteriuria
o Obstructive or irritative voiding symptoms
o Vague discomfort in pelvis and perineum
o Physical findings on palpation unremarkable
o Must have EPS or postmassage urine culture for precise diagnosis
- Symptoms
of prostatitis
o Genitourinary
pain
o Dysuria
o Clear discharge
o Recurrent UTI
- The spectrum
of organisms grown in culture in chronic bacterial prostatitis is essentially
the same as in acute bacterial prostatitis. Most infections are caused
by a single pathogen, but a polymicrobial infection is not unusual.
Obligate anaerobic bacteria rarely cause prostatic infection.
Localization
cultures need not demonstrate greater than 100,000 cfu/ml for the diagnosis.
Instead, the presence of a greater than 10-fold bacterial growth in the
EPS or VB3 specimens compared to the VB1 and VB2 is important.
- Common
bacterial pathogens
o Escherichia
coli (80%)
o Klebsiella species
o Enterobacter
o Proteus enterococci species
o Pseudomonas
o Others
Physical:
The physical examination, including the prostate examination by digital
rectal examination, is typically normal.
- The prostate
may have areas of firmness related to chronic inflammation. While prostatic
calculi are associated with a higher risk of chronic bacterial prostatitis,
they are rarely palpable on prostate examination because of their location
typically deep within the prostate gland.
- In contrast,
acute bacterial prostatitis is characterized by a very tender, warm,
swollen, firm gland. When acute bacterial prostatitis is suspected,
prostate massage should be avoided because of the risk of causing bacteremia.
- While
chronic bacterial prostatitis may be associated with symptoms of perineal,
scrotal, and low back discomfort, the physical examination is typically
normal.
Causes:
The actual routes of prostatic infection are unknown in most cases, but
various etiologies may be found. Ascending urethral infection is a known
route because of the frequency of previous gonococcal prostatitis in the
past, as well as the finding of identical prostatic fluid and vaginal
culture organisms in many couples. Intraprostatic urinary reflux has been
demonstrated in human cadavers, and may play a role.
- Routes
of Infection
o Ascending
urethral infection
o Reflux of infected urine into prostatic ducts
o Migration of rectal bacteria via direct extension or lymphogenous
spread
o Hematogenous infection
- The relapsing
nature is in part due to the ductal anatomy of the peripheral zone of
the prostate. The anatomy of the ductal system prevents dependent drainage
of secretions. Ductal fibrosis and prostatic calculi, if present, further
inhibit the drainage of secretions.
- E coli
accounts for 80% of chronic bacterial prostatitis. The other members
of the Enterobacteriaceae family, Klebsiella species, Pseudomonas aeruginosa
and Proteus also are known pathogens.
- The role
of the gram-positive organisms Staphylococcus epidermitis and <>is
controversial. These organisms may normally colonize the anterior urethra.
- Chlamydia
trachomatis has been implicated as a cause of chronic bacterial prostatitis.
However, this organism is unlikely to play a major role in the etiology
of chronic bacterial prostatitis.
- NIH classification
of prostatitis: Based upon specific etiologies, the NIH classified the
various forms of prostatitis in 1995. The most common prostatitis is
type III, the chronic pelvic pain syndrome category.
o Type
I acute bacterial prostatitis
- Often
found on biopsies or surgical specimens
- No
treatment warranted
- Biopsy
typically triggered by elevated PSA
DIFFERENTIALS
Chronic Pelvic Pain
Chronic Prostatitis
Perianal Abscess
Prostate Hyperplasia, Benign
Prostatitis, Bacterial
Prostatitis, Tuberculous
Prostatodynia
Ureteral Stricture
Urinary Tract Infection, Males
Urinary Tract Obstruction
Other
Problems to be Considered:
Acute prostatitis
Bacteriuria
Cystitis
Prostatic abscess
WORKUP
Lab Studies:
- The various
prostatitis syndromes have been classified based on expressed prostatic
secretion (EPS) and urine culture findings. This classification system
is important for therapy, because the various categories are treated
differently. The presence of 10 or more white blood cells per high power
field in the EPS is considered clinically significant inflammation.
EPS findings
are detailed as follows:
o Chronic
bacterial prostatitis
The EPS in
this condition usually is associated with greater than 10 wbc/hpf and
should be obtained. Unlike patients with acute bacterial prostatitis,
these patients are not acutely ill. Urine culture shows no growth unless
the patient develops an acute UTI, in which case culture would demonstrate
the same spectrum of organisms as in acute bacterial prostatitis.
o Acute
bacterial prostatitis
Expressed
prostatic secretions (EPS) should not be obtained in acute bacterial prostatitis
for risk of potentiating bacteremia. If the EPS is obtained inadvertently,
sheets of white blood cells are present. Significant bacterial growth
is present in the voided urine from the presence of an accompanying cystitis.
o Non-bacterial
prostatitis
In this condition,
significant inflammation is present within the prostate as characterized
by greater than 10 WBC/HPF. However, routine bacterial culture does not
demonstrate growth of organisms. Cultures for fungi, Chlamydia, Ureaplasma,
and Mycoplasma rarely demonstrate growth.
o Prostatodynia
No inflammation
in the EPS or bacterial growth in culture is present. "Pelviperineal
pain" is an appropriate name to describe the symptoms in this condition.
Imaging Studies:
- Imaging
studies are not necessary for the diagnosis and treatment of chronic
bacterial prostatitis. The criterion standard for diagnosis is the 3-cup
bacterial localization study.
- Transrectal
ultrasonography cannot diagnose chronic bacterial prostatitis. While
hypoechoic lesions and calcifications within the prostate may suggest
the infection and inflammation associated with chronic bacterial prostatitis,
these findings are highly nonspecific.
Other
Tests:
- If a patient
with chronic bacteriuria does not have chronic bacterial prostatitis
as demonstrated on the 3-cup test, then referral to a urologist is advisable.
Chronic bacteriuria should prompt an investigation for underlying causes,
such as urinary stasis, infection stones, abscess, and obstruction.
o In
this situation, evaluation of the upper urinary tract with radiologic
imaging such as an IVP, renal ultrasound, or CT scan often is performed.
o In addition, chronic bacteriuria in the absence of chronic bacterial
prostatitis may prompt evaluation of the bladder with a cystoscopy.
Procedures:
- Three
cup test: This test represents the classic method for the diagnosis
of bacterial prostatitis. The technique was described initially by Meares
and Stamey in 1968.
o VB1:
The voided bladder 1 (VB1) specimen represents any bacterial growth
within the urethra. The patient is asked to retract the foreskin,
if present, and cleanse the meatus. The VB1 is the first 5-10 mL
of voided urine and should be collected in a sterile cup.
o VB2: After the VB1 collection, the patient urinates another 100-150
mL of urine. The next 10-15 mL is collected into a sterile cup and
represents VB2, the bladder component of any bacterial growth.
o EPS: The expressed prostatic secretion (EPS) represents the prostate
contribution. The EPS is obtained by massaging and compressing the
prostate gland until a drop of fluid is obtained. The VB3 is examined
under a high power field in a microscope. The presence of greater
than 10 WBC/HPF is abnormal and consistent with prostatic inflammation.
o In addition to white blood cells, the EPS may contain oval bodies,
which are macrophages that contain fat. These oval bodies are also
indicative of inflammation.
o VB3: The VB3 represents a mixture of prostatic fluid and bladder
urine. The VB3 is the first 5-10 ml of urine obtained after the
prostate massage for the EPS. Similarly, this VB3 is sent for culture.
- The 3-cup
test is performed best when the bladder urine is sterile. If the bladder
urine is not sterile, an oral antibiotic such as nitrofurantoin may
be prescribed to achieve bladder urine sterilization. Nitrofurantoin
achieves excellent bladder concentrations, but does not produce significant
intraprostatic levels.
Histologic
Findings:
Chronic bacterial prostatitis is not diagnosed with a prostate biopsy.
However, men having a prostate biopsy performed for the diagnosis of prostate
cancer may show focal areas of inflammation characterized by a lymphocytic
response. The pathology report often is listed as "chronic prostatitis."
While this type of finding may represent chronic bacterial prostatitis,
it also may represent non-bacterial prostatitis. The history of chronic
urinary tract infections provides the clinical diagnosis.
TREATMENT
Medical Care:
The
mainstay for treatment of chronic bacterial prostatitis is the use of
oral antimicrobial agents. The most effective medications are fluoroquinolones
and trimethoprim-sulfamethoxazole.
All other oral agents are unlikely to successfully eradicate the pathogenic
bacteria within the prostate because of suboptimal tissue penetration.
Longer courses of antibiotic use are associated with better treatment
outcomes. Relapse is not uncommon.
- The reasons
for relapsing urinary tract infections are the poor penetration of most
antimicrobial agents into the prostatic fluid and/or bacterial sequestration,
which protects them from antimicrobial exposure. Only small molecular
size, un-ionized, lipid-soluble drugs not firmly bound to plasma proteins
are able to diffuse across the epithelial membrane.
- Those
antimicrobial agents that most effectively penetrate into the prostatic
fluid, such as fluoroquinolones and trimethoprim-sulfamethoxazole, are
good treatment choices for chronic bacterial prostatitis.
Treatment
should be guided by urine culture results. Failure of an initial course
of therapy (typically about 4 weeks) should prompt longer courses of treatment.
Best results have been observed with a 12-week course of therapy, although
patient compliance may be difficult with longer durations of treatment.
High bactericidal activity has been demonstrated against the Enterobacteriaceae
group of bacteria and Pseudomonas aeruginosa using fluoroquinolones, a
class of antimicrobial agents that inhibits bacterial DNA replication
and protein synthesis.
Fluoroquinolones generally are ineffective against the Streptococci, including
enterococcus, and anaerobes. Penicillin derivatives, while effective against
gram-positive organisms, generally are ineffective in treating bacterial
prostatitis because of poor prostate penetration.
- While
zinc supplements have been suggested as a medical therapy, clinical
results have not been significant. A zinc-containing polypeptide called
prostatic antibacterial factor (PAF) may be an important antimicrobial
factor within the prostate.
Prostate fluid is also rich in spermine, which has activity against
gram-positive bacteria. Other factors of potential importance in prostate
fluid include magnesium, calcium, and lysozyme. Other local immune factors
are also under investigation.
- Barbalias
et al have suggested that the use of alpha-blockers in combination with
fluoroquinolones would have significantly superior symptom resolution
and bacteriologic cure rated compared to fluoroquinolone treatment alone.
Further study is necessary to define the benefit of the addition of
alpha-blocker therapy.
- Non-steroidal
anti-inflammatory agents, hot sitz baths, and prostatic massage are
oftenused
clinically for symptomatic relief. Their benefit in bacteriologic eradication
of organisms is not established, however. Frequent prostate massage
was used extensively several decades ago, before studies of fluoroquinolones
and TMP-SMX were available.
- Tetracycline,
minocycline, and doxycycline have also been used. They are not considered
first-line therapy, but may be quite helpful if a Pseudomonas infection
is present. Paulson reported a 70% bacteriologic cure rate with 4 weeks
of minocycline, but studied only 10 men and 30% developed significant
vestibular toxicity. More recent studies indicate a 35% bacteriologic
cure rate with minocycline.
Penicillins
are ineffective, with the exception of carbenicillin indanyl sodium at
500 mg/day. Carbenicillin may be effective for Enterobacteriaceae or Pseudomonas
infections. Large-scale studies are not available.
Surgical Care:
The "radical" transurethral prostatectomy (TURP) has been suggested
as a surgical treatment for resection of all infected prostatic tissue.
Because most of the inflammation is located in the peripheral zone of
the gland, an extensive resection of the gland is required to remove all
infected and potentially infected tissue down to the level of the true
prostatic capsule.
Only one series of 10 patients, most having prostatic calculi, has been
reported, but all men were considered cured (Meares 1986). This procedure
is indicated, although only rarely, for those men failing one year of
medical pharmacotherapy with well-documented bacterial infections.
- The Role
of Prostatectomy in Chronic Bacterial Prostatitis
o Rarely
indicated
o "Radical" transurethral prostatectomy (TURP) suggested
o Possibly more effective in men with prostatic calculi
- Intraprostatic
injection of antimicrobial agents
o Suggested
in an effort to obtain high concentrations of antimicrobial agents
in the prostatic parenchyma.
o Plomp et al noted a 66% bacteriologic cure rate in 29 men with
thiamphenicol. Jiminez-Cruz et al noted a 59% cure rate in 51 men
with aminoglycoside injection. Unfortunately, these studies have
significant methodological flaws so the conclusions cannot be considered
definitive.
o Rarely used.
Consultations:
Consultation with a urologist may be appropriate for those men with relapsing
chronic bacterial prostatitis, or when the diagnosis is unclear.
· A urologist may be able to properly perform the bacterial localization
studies necessary to diagnose chronic bacterial prostatitis. In the author's
experience, most primary care physicians are not comfortable or experienced
with obtaining VB1, VB2, EPS, and VB3 specimens.
Diet:
Diet
does not have an important role in treating chronic bacterial prostatitis.
Some physicians have advocated the avoidance of spicy and caffeine-containing
foods; however, there has not been any evidence of benefit in chronic
bacterial prostatitis.
Activity:
Activity
does not have a prominent role in the treatment of chronic bacterial prostatitis
although we often advise patients to avoid bicycling or other activities
that may put pressure on the perineal region.
- The role
of ejaculation in the treatment of chronic bacterial prostatitis is
unknown. One theory is that frequent ejaculation may help clear prostatitic
secretions, thereby allowing for quicker resolution.
MEDICATION
The goal of pharmacotherapy is to treat the infection and reduce morbidity.
Drug Category: Fluoroquinolones -- These agents are concentrated in the
prostate and are lipid-soluble.
Drug
Name
|
Ciprofloxacin
(Cipro) -- It is a bactericidal antibiotic that inhibits bacterial
DNA synthesis, and consequently growth, by inhibiting DNA-gyrase
in susceptible organisms. |
| Adult
Dose |
500
mg PO bid for 4 wk |
| Pediatric
Dose |
<18
years: Not recommended
>18 years: Administer as in adults |
| Contraindications |
Documented
hypersensitivity |
| Interactions |
Cimetidine
may interfere with the metabolism of fluoroquinolones and reduce
the therapeutic effects of phenytoin.
Probenecid may increase ciprofloxacin serum concentrations significantly.
Ciprofloxacin may increase theophylline and caffeine concentrations
and prolong their duration of action. It also may increase the nephrotoxic
effects of cyclosporine.
Digoxin serum levels may be increased when used concurrently with
ciprofloxacin. Digoxin levels should be monitored.
Ciprofloxacin may increase the effects of anticoagulants. Prothrombin
time should be monitored. |
Pregnancy
|
C
- Safety for use during pregnancy has not been established. |
| Precautions |
It
may cause arthropathy in children from cartilage destruction.Absorption
is decreased in presence of divalent cations (Ca, Mg, Fe, Zn) -
avoid concurrent milk/antacids/multivitamins.Phototoxicity, pseudomembranous
colitis, and cataracts have been reported.Adjust the dose in patients
with impaired renal or liver function. |
Drug Category: Fluoroquinolones
Drug
Name
|
Levofloxacin
(Levaquin) -- It is indicated for pseudomonal infections and those
that are due to multidrug resistant gram-negative organisms. |
| Adult
Dose |
250-500
mg PO qd |
| Pediatric
Dose |
<18
years: Not recommended
>18
years: Administer as in adults
|
| Contraindications |
Documented
hypersensitivity |
| Interactions |
Antacids,
iron salts, and zinc salts may interfere with GI absorption of the
fluoroquinolones, resulting in decreased serum levels. Administer
antacids 2 to 4 hours before or after giving the fluoroquinolone.
Cimetidine may interfere with the elimination of the fluoroquinolones.
Levofloxacin may reduce phenytoin serum levels, producing a decrease
in therapeutic effects.
Probenecid may reduce levofloxacin renal clearance and significantly
increase serum concentrations.
Total body clearance of caffeine is reduced, possibly resulting
in increased pharmacologic effects.
Levofloxacin may increase the nephrotoxic effect of cyclosporine.
Digoxin serum levels may be increased when used concurrently with
levofloxacin. Digoxin levels should be monitored.
Levofloxacin may increase the effects of anticoagulants. Prothrombin
time should be monitored. |
Pregnancy
|
C
- Safety for use during pregnancy has not been established. |
| Precautions |
It
may cause arthropathy in children from cartilage destruction.
Absorption is decreased in presence of divalent cations (Ca, Mg,
Fe, Zn) - avoid concurrent milk/antacids/multivitamins.
Phototoxicity, pseudomembranous colitis, and cataracts have been
described.
Adjust dose in patients with impaired renal or liver function, monitor
patients. |
Drug Category:
Trimethoprim-sulfamethoxazole -- Trimethoprim is concentrated in the prostate
and is lipid-soluble.
Drug
Name
|
Trimethoprim-sulfamethoxazole
(TMP-SMX, Bactrim) -- It inhibits bacterial synthesis of dihydrofolic
acid by competing with para-aminobenzoic acid. This results in the
inhibition of bacterial growth. |
| Adult
Dose |
One
double-strength tablet (160 mg TMP/800 mg SMX) PO bid for 4 wk |
| Pediatric
Dose |
20
mg TMP/kg/d IV divided bid |
| Contraindications |
Avoid
use in patients with documented hypersensitivity to this drug or
related products.
Porphyria, megaloblastic anemia due to folate deficiency, and infants
less than 2 mo are contraindications for this medication. |
| Interactions |
This
medication may increase the prothrombin time of warfarin and thus
should monitor coagulation tests and the dose adjusted as necessary.
Increased serum levels of both dapsone and TMP may occur when both
medications are administered concomitantly.
In elderly patients, the incidence of thrombocytopenia purpura may
increase when it is used concurrently with diuretics.
The hepatic clearance of phenytoin may be decreased and its half-life
prolonged when administered concurrently with trimethoprim/sulfamethoxazole.
Sulfonamides can displace methotrexate (MTX) from plasma protein
binding sites, thus increasing free MTX concentrations. This may
potentiate methotrexate effects in bone marrow depression.
The hypoglycemic response of sulfonylureas may be increased with
the concurrent administration of both medications.
It may decrease the renal clearance of zidovudine, causing an increase
in zidovudine levels. |
Pregnancy
|
X
- Contraindicated in pregnancy |
| Precautions |
Discontinue
the drug at the first appearance of skin rash or any sign of adverse
reaction.
Obtain complete blood counts frequently. If a significant reduction
in the count of any formed blood element is noted, discontinue
therapy.
Goiter production, diuresis, and hypoglycemia may occur in patients
receiving sulfonamides.
High IV doses or prolonged infusions may cause bone marrow depression
manifested as thrombocytopenia, leukopenia, or megaloblastic anemia.
Exercise caution in patients with possible folate deficiency such
as chronic alcoholics, the elderly, and those receiving anticonvulsant
therapy, or have malabsorption syndrome.
Hemolysis may occur in G-6-PD deficient individuals. If signs
of bone marrow depression occur, give leucovorin as needed to
restore normal hematopoiesis. Oral leucovorin, 5 to 15 mg/d has
been recommended.
Because of their unique immune dysfunction, AIDS patients may
not tolerate or respond to TMP-SMZ.
Use with caution in patients diagnosed with renal or hepatic impairment.
Adequate fluid to prevent crystalluria and stone formation should
be administered. Perform urinalyses and renal function tests during
therapy.
|
FOLLOW-UP
Further Outpatient Care:
- After
completion of a 4-week course of a fluoroquinolone or TMP-SMX, repeating
the 3-cup test is advisable. The recurrent and persistent nature of
chronic bacterial prostatitis encourages efforts for eradication confirmed
by negative bacterial cultures.
- Persistent
bacterial growth should be treated with another 4-week trial of antibiotics.
Repeat susceptibility testing is necessary.
Prognosis:
- A 4-6
week course of TMP-SMX results in 33-50% bacteriologic cure rates.
- A 4-6
week course of fluoroquinolone therapy is equally as successful, if
not more, as TMP-SMX. A 63% durable response rate at 30 months after
treatment was reported by Weidner et al.
|