title: Unusual involvement of the rectum by carcinoma of the prostate.
abstract: The authors present three cases in which carcinoma of the prostate simulates a primary carcinoma of the rectum. Direct invasion by prostatic carcinoma should be included in the differential diagnosis of mass lesions of the rectum in males.
mesh_terms: D000368:Aged; D002277:Carcinoma / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D009362:Neoplasm Metastasis; D011471:Prostatic Neoplasms / Q000175:diagnosis / Q000473:pathology*; D011859:Radiography; D012004:Rectal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging / Q000473:pathology*; D012811:Sigmoid Neoplasms / Q000175:diagnosis / Q000473:pathology