Colon polyps and colon cancer occur throughout the entire colon with essentially equal frequency. Colon polyps usually don t bleed until they are very large or have degenerated into colon cancer. Therefore a negative or normal hemocult card test means absolutely nothing. A digital rectal exam only feels the rectal walls - the last 3 to 4 inches of your colon. If a polyp is found during Sigmoidoscopy you usually need a complete colonoscopy anyway to remove it.
Barium enemas are incomplete.
If the Barium enema is abnormal, colonoscopy is performed next anyway. I passed bright red blood only once with a bowel movement. I was constipated, straining, etc. It s just my hemorrhoids. I don t need to do anything else.