title: An interesting case of cancer of the sigmoid with concomitant cancer in an anal fistula.
mesh_terms: D000230:Adenocarcinoma / Q000150:complications*; D001005:Anus Neoplasms / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012003:Rectal Fistula / Q000150:complications*; D012811:Sigmoid Neoplasms / Q000150:complications*