I am still wondering if I had the sigmoidoscopy recently if I could have full blown colon cancer so soon after the test? Isnt barium enema a good test? Also would all of my stool be thin all the time or just sometimes? Is loose stool a symptom of colon cancer because my doctor says it is constipation that can signal colon cancer. Thanks Diana
Yes, colon cancer can be caused by changes in bowel habits, including changes in shape and caliber.
A sigmoidoscopy and barium enema are adequate tests to screen for cancer, but as you suspected, a colonoscopy would be the definitive test.
If you a truly concerned about colon cancer, I would pursue the colonoscopy. There are some institutions that do a "no-sedation" colonoscopy, but you have to be a motivated patient.
Another alternative would be a CT, or "virtual," colonoscopy, but not all institutions offer the test.
These options can be discussed with your personal physician.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Kevin Pho, M.D.
www.kevinmd.com
www.twitter.com/kevinmd