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Sigmoidoscopy is a diagnostic procedure used to examine the lower part of the colon, specifically the rectum and sigmoid colon. The sigmoid colon is the S-shaped last section of the large intestine that connects to the rectum. This procedure helps detect abnormalities such as polyps, ulcers, inflammation, and early signs of colorectal cancer.
The doctor uses a sigmoidoscope, a flexible, thin tube with a light and camera, to examine the lower colon. The scope is inserted through the rectum, allowing the doctor to visualize the colon lining on a monitor. This procedure is typically recommended for investigating symptoms like rectal bleeding, changes in bowel habits, or unexplained abdominal pain.
Sigmoidoscopy is commonly used as a screening tool for colorectal cancer and inflammatory bowel diseases like ulcerative colitis. Unlike a colonoscopy, it does not examine the entire colon but focuses on the lower third. If abnor
