UroToday.com - Unexplained clinical conditions have been referred to by many names including functional somatic syndromes. They are characterized by a lack of clear physical or biological etiology, or inconsistent demonstration of laboratory abnormalities. Bladder pain syndrome and chronic pelvic pain syndrome (CPPS) in men NIDDK type 3 (nonbacterial prostatitis) would fall under this umbrella.View the full article