The most common type of prostatitis is category III, also known as chronic prostatitis/chronic pelvic pain syndrome (CP/CPPS). The current National Institutes of Health definition of CP/CPPS includes genitourinary pain with or without voiding symptoms in the absence of uropathogenic bacteria, as detected by standard microbiological methods, or other identifiable causes such as malignancy. Many different etiologies and mechanisms of pathogenesis of CP/CPPS have been proposed with a suggested role for immunological, neurological, endocrine, and psychological factors. We examined the data supporting the role of each of these areas and also examined the possible interrelationship of these factors in producing the symptoms of CP/CPPS. Prostatitis types IIIa and IIIb are classified according to the presence of pain without concurrent presence of bacteria; however, it is becoming more evident that, although levels of bacteria are not directly associated with levels of pain, the presence of bacteria might act as the initiating factor that drives primary activation of mast-cell-mediated inflammation in the prostate. The gate control theory provides a neurologic basis for the influence of both somatic and psychological factors on pain. Acceptance of chronic pain as a diagnosis may be difficult for the clinician and patient, however it is an important concept in the care of CP/CPPS, which enables the use of pain-directed therapies. Management of CP/CPPS will remain challenging; however, this review provides a better understanding of the condition and improved management strategies based on the newest evidence and concepts available.
Keywords: Prostatitis; Chronic pain; Physiopathology
INTRODUCTIONChronic prostatitis/chronic pelvic pain syndrome (CP/ CPPS) is a condition of chronic pelvic pain in men [1]. It has been estimated that between 2% and 14% of men worldwide may have symptoms of CP/CPPS [2,3]. The diagnosis is made on the basis of symptoms of pain with or without voiding symptoms in the absence of other identifiable causes [4]. The etiology of symptoms in a given patient can be from many causes. Whether there are identifiable, repeatable patterns of causes of symptoms, or just individual patients with distinct individual phenotypes are unknown. Because CP/CPPS is a common condition associated with significant physical, mental, and social burden, the medical community has made tremendous efforts to understand the condition and improve management strategies. Despite these efforts, answers remain elusive. Robust tools to measure symptom severity Our improved understanding of the etiology and clinical phenotypes associated with CP/CPPS has made the condition less of a clinical enigma. Acceptance of clinical definitions (and classification system) and validated, reliable outcome questionnaire (the CP symptom index) has led to high-quality treatment evidenced from randomized placebo-controlled trials. This article is a very timely review of the topic and provides the clinician with an improved understanding of CP/CPPS a...