title: Complicated para-anal fistulas of obscure etiology.
mesh_terms: D003125:Colostomy; D004240:Diverticulum / Q000150:complications*; D005401:Fissure in Ano / Q000150:complications / Q000209:etiology*; D006801:Humans; D007416:Intestinal Perforation / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011859:Radiography; D012003:Rectal Fistula / Q000150:complications