Meckel's diverticulum presenting as fistula-in-ano.
D000328:Adult; D003937:Diagnosis, Differential; D005401:Fissure in Ano / Q000175:diagnosis*; D006801:Humans; D008297:Male; D008467:Meckel Diverticulum / Q000175:diagnosis* / Q000601:surgery; D011859:Radiography; D012007:Rectum / Q000000981:diagnostic imaging