Unusual smooth muscle tumour of the rectum.
D003937:Diagnosis, Differential; D006801:Humans; D007890:Leiomyosarcoma / Q000175:diagnosis* / Q000473:pathology; D008297:Male; D008875:Middle Aged; D010673:Pheochromocytoma / Q000473:pathology; D012004:Rectal Neoplasms / Q000175:diagnosis* / Q000473:pathology