title: The giant polyp--a case of leiomyosarcoma of the rectum.
mesh_terms: D000328:Adult; D006801:Humans; D007890:Leiomyosarcoma / Q000473:pathology*; D008297:Male; D009364:Neoplasm Recurrence, Local; D012004:Rectal Neoplasms / Q000473:pathology*