Adenocarcinoma of sigmoid colon seeding into pre-existing fistula in ano.
D000230:Adenocarcinoma / Q000150:complications / Q000556:secondary*; D000368:Aged; D001005:Anus Neoplasms / Q000556:secondary*; D002908:Chronic Disease; D006801:Humans; D008297:Male; D009366:Neoplasm Seeding; D012003:Rectal Fistula / Q000150:complications*; D012811:Sigmoid Neoplasms / Q000150:complications