Sigmoidoscopy and colonoscopy are both endoscopic procedures used to examine the colon. However, there are key differences:
Sigmoidoscopy examines only the rectum and sigmoid colon, while colonoscopy examines the entire colon. Sigmoidoscopy is typically shorter in duration and may not require sedation, whereas colonoscopy often requires deeper sedation. Colonoscopy is more comprehensive and may be preferred for patients with risk factors for colon cancer.
The choice between the two procedures depends on the clinical scenario and the specific information needed.