Flexible Sigmoidoscopy
This information was developed by the Publications Committee of the American Society for Gastrointestinal Endoscopy (ASGE). For more information about ASGE, visit www.asge.org.
This information is intended only to provide general guidance. It does not provide definitive medical advice. It is important that you consult your doctor about your specific condition.
What is Flexible Sigmoidoscopy?
A flexible sigmoidoscopy (sig-moi-DOS-kuh-pee) is an exam used to evaluate the lower part of the large intestine (colon). During a flexible sigmoidoscopy exam, a thin, flexible tube (sigmoidoscope) is inserted into the rectum.
Trained medical professionals use flexible sigmoidoscopy to look inside your rectum and the lower part of your colon, including the sigmoid and descending colon.
What happens during Flexible Sigmoidoscopy?
Flexible sigmoidoscopy doesn’t allow the doctor to see the entire colon. As a result, flexible sigmoidoscopy alone can’t detect cancer or small clumps of cells that could develop into cancer (polyps) farther into the colon.