Why is a sigmoidoscopy performed?

A sigmoidoscopy is performed to examine the lower part of the colon (sigmoid colon and rectum) for abnormalities such as polyps, tumors, inflammation, or bleeding. It is often used as a diagnostic tool for conditions like colorectal cancer, inflammatory bowel disease, and unexplained gastrointestinal symptoms. Additionally, it can assist in biopsying tissue for further analysis. The procedure is minimally invasive and typically requires less preparation than a full colonoscopy.