Prominent lateral mucosal folds in the bulbous urethra.
D000293:Adolescent; D000328:Adult; D002648:Child; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009093:Mucus / Q000033:anatomy & histology; D011859:Radiography; D014521:Urethra / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D014522:Urethral Diseases / Q000000981:diagnostic imaging