title: Male urethral diverticulum: the double density sign.
abstract: An anatomic defect of the urethra is occasionally the cause of voiding dysfunction in the young male patient. A urethral diverticulum can often be overlooked if retrograde urethrography is not performed properly. Two cases are presented along with a discussion of the technique for dynamic retrograde urethrography. The description of a new radiologic sign indicative of a posterior bulbar urethral diverticulum, is presented.
mesh_terms: D000328:Adult; D004240:Diverticulum / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D006801:Humans; D008297:Male; D008722:Methods; D011859:Radiography; D014521:Urethra / Q000000981:diagnostic imaging; D014522:Urethral Diseases / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D014555:Urination Disorders / Q000209:etiology