The colon cancers which present an ambiguous picture.
D000230:Adenocarcinoma / Q000601:surgery; D000368:Aged; D002277:Carcinoma / Q000175:diagnosis* / Q000601:surgery; D003110:Colonic Neoplasms / Q000175:diagnosis* / Q000601:surgery; D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D004381:Duodenal Ulcer / Q000175:diagnosis; D005260:Female; D006484:Hemorrhoids / Q000175:diagnosis; D006801:Humans; D002542:Intracranial Embolism and Thrombosis / Q000150:complications; D008297:Male; D011351:Proctoscopy