Nephrology and Urology· Topic 9.5 Urinary tract infections· 9.5.7

Chronic prostatitis and chronic pelvic pain syndrome

The NIH classifies prostatitis into four categories; category III chronic pelvic pain syndrome accounts for over 90% of presentations and is diagnosed by excluding infection, not by finding it, then treated with multimodal, domain-directed therapy rather than a single drug.

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What this article covers

  • Overview

    A syndrome, not one disease: the NIH consensus classification divides "prostatitis" into category I acute bacterial prostatitis, category II chronic bacterial prostatitis, category III chronic pelvic…

  • Epidemiology

    Prevalence: prostatitis (all categories) has an estimated prevalence of 9.7% among men; category III CP/CPPS accounts for the large majority of these presentations.

  • Risk factors

    Prior acute or recurrent infection: category II commonly follows category I or recurrent UTI with the same organism; CP/CPPS may also follow a prior infection even when no organism is later recoverable.

  • Pathophysiology

    Category I/II - ascending bacterial infection: urethral pathogens (gram-negative organisms cause roughly 80%, about two-thirds Escherichia coli, with Proteus, Enterobacter, Serratia, Klebsiella…

  • Clinical features

    Defining criterion (establishes the diagnosis): pelvic/genitourinary pain (perineal, suprapubic, penile, testicular, and/or low back) present at least 3 months, with lower urinary tract symptoms…

  • Differential diagnosis

    Acute bacterial prostatitis (category I): fever, chills, an exquisitely tender boggy prostate, and roughly 25% bacteremia risk; the most urgent mimic to exclude.

  • Diagnosis

    How the diagnosis is established: CP/CPPS is a clinical diagnosis of pelvic/genitourinary pain for 3 months or more, with or without LUTS or painful ejaculation, and no bacterial cause on…

  • Management

    First, confirm category III and set expectations: once infection, malignancy, and structural disease are excluded, explain that no single drug is reliably effective and about 30% improve regardless…

  • Complications

    Chronic, relapsing pelvic pain despite domain-directed therapy in a substantial subset, with meaningful quality-of-life impact.

  • Prognosis

    No universally effective cure: resolution is not guaranteed even with adherent multimodal therapy; the realistic goal is symptom control and quality of life.

  • Prevention

    Complete treatment of confirmed infection: finishing a full 2- to 6-week culture-guided course for category I reduces the risk of evolving into category II.

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