title: A composite tumor in tubulovillous adenoma of the rectum.
mesh_terms: D000230:Adenocarcinoma / Q000473:pathology*; D000236:Adenoma / Q000473:pathology*; D000368:Aged; D002276:Carcinoid Tumor / Q000473:pathology*; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D012004:Rectal Neoplasms / Q000473:pathology*