Your colon helps your body absorb water and nutrients from the food you eat. It’s also where your stool is formed. The last third of your descending colon is called the sigmoid colon. It’s connected to your anus by your rectum.
You may get this test if you have certain gut problems, such as
- abdominal pain
- rectal bleeding
- changes in bowel habits
- colon and rectal cancer.
A sigmoidoscope is a long, flexible tube that’s about half an inch in diameter. It has a tiny light and camera. A doctor uses it to view the lining of the rectum and the lower third of the colon.
A colonoscopy helps doctors examine the entire colon. But sometimes only the sigmoid colon warrants close inspection. That’s when a doctor will recommend a sigmoidoscopy.
A sigmoidoscopy, also called a flexible sigmoidoscopy, is a procedure that lets your doctor look inside your sigmoid colon by using a flexible tube with a light on it. It helps your doctor check for:
- abnormal cells