Colonoscopy vs. Sigmoidoscopy: Doctors Can’t Make Up Their Minds
Recently, there has been quite a controversy regarding two different colon cancer screening methods. Patients are asking whether a colonoscopy or sigmoidoscopy is better, and doctors just can’t seem to make up their minds.
First, let’s talk about the procedures themselves.

Colonoscopy:
A colonoscopy involves inserted a lighted tube into the colon through the anus. A video camera is attached to the tube, allowing the doctor to see the entire length of the colon.
Sigmoidoscopy:
A sigmoidoscopy, on the other hand, involves using a sigmoidoscope which is inserted into the colon through the anus, allowing the doctor to search the inside of the rectum and the first third of the colon.
The main difference seems clear: Colonoscopies screen the entire colon, and sigmoidoscopies only screen a third of it. But why is it that doctors have such differing views about which of the procedures works best?










