[Internal outlet of anorectal fistulas].
D005401:Fissure in Ano / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D011859:Radiography; D012003:Rectal Fistula / Q000000981:diagnostic imaging / Q000601:surgery*
O vnutrenem otverstii anorektal'nykh fistul.