Congenital polyp of the verumontanum.
D002675:Child, Preschool; D006801:Humans; D008297:Male; D011127:Polyps / Q000151:congenital* / Q000000981:diagnostic imaging; D011859:Radiography; D014521:Urethra / Q000000981:diagnostic imaging; D014523:Urethral Neoplasms / Q000151:congenital*; D001743:Urinary Bladder / Q000000981:diagnostic imaging