Cancer in anal fistulas: report of two cases.
D000328:Adult; D001005:Anus Neoplasms / Q000150:complications* / Q000175:diagnosis*; D002277:Carcinoma / Q000150:complications / Q000175:diagnosis; D005260:Female; D005401:Fissure in Ano / Q000150:complications*; D006801:Humans; D008297:Male