Prostatitis is an infection or inflammation of the prostate gland that presents as several syndromes with varying clinical features. The term prostatitis is defined as microscopic inflammation of the tissue of the prostate gland and is a diagnosis that spans a broad range of clinical conditions.
The National Institutes of Health (NIH) has recognized and defined a classification system for prostatitis in 1999. The 4 syndromes of prostatitis are as follows:
I - Acute bacterial prostatitis
II - Chronic bacterial prostatitis
III - Chronic prostatitis and chronic pelvic pain syndrome (CPPS; further classified as inflammatory or noninflammatory)
IV - Asymptomatic inflammatory prostatitis