Bleeding is the most common clinical manifestation of cancer of the rectum. Covering the surface of bleeding is usually dark-colored stool and blood is mixed. Rarely, may be in the form of fresh blood, and therefore confused with hemorrhoids. Tenesmus and defecation do a full sense of distal rectal cancer is localized. May be changes in defecation habits. Mucoid diarrhea, villous adenoma into cancer can be monitored. Other findings of the rectal ampulla to be large because of the obstruction is found in cancers of the colon is rare. Severe anal pain, anal canal may be indicative of invasion. Rectal cancers, the findings may not be part of the advanced stage.
Clinical examination with digital rectal examination begins. 8-10 cm of the distal portion of the rectum palpable touch it. Proximal tumors. Rectal cancer is accessible to all rigid. Colonoscopy tumor location, macroscopic appearance of size, distance from the anal and biopsy can be evaluated. Synchronous colorectal cancers by 6% due to the risk of cancer of the colon by colonoscopy all need to be examined. Virtual colonography can be made for the examination of the colon tumors that do not allow relaying.