Flexible sigmoidoscopy; Sigmoidoscopy - flexible; Proctoscopy; Proctosigmoidoscopy; Rigid sigmoidoscopy; Colon cancer sigmoidoscopy; Colorectal sigmoidoscopy; Rectal sigmoidoscopy; Gastrointestinal bleeding - sigmoidoscopy; Rectal bleeding - sigmoidoscopy; Melena - sigmoidoscopy; Blood in stool - sigmoidoscopy; Polyps - sigmoidoscopy
Sigmoidoscopy is a procedure used to see inside the sigmoid colon and rectum. The sigmoid colon is the area of the large intestine nearest to the rectum.
During the test:
Sigmoidoscopy using a rigid scope may be done to treat problems of the anus or rectum.
During the exam you may feel:
After the test, your body will pass the air that was put into your colon.
Children may be given medicine to make them sleep lightly (sedated) for this procedure.
Your health care provider will tell you how to prepare for the exam. You will use an enema to empty your bowels. This is usually done 1 hour before the sigmoidoscopy. Often, a second enema may be recommended. Or, your provider may recommend a liquid laxative the night before.
On the morning of the procedure, you may be asked to fast with the exception of certain medicines. Be sure to discuss this with your provider well in advance. Sometimes, you are asked to follow a clear liquid diet the day before, and sometimes a regular diet is allowed. Again, discuss this with your provider well in advance of your test date.
A normal test result will show no problems with the color, texture, and size of the lining of the sigmoid colon, rectal mucosa, rectum, and anus.
There is a slight risk of bowel perforation (tearing a hole) and bleeding at the biopsy sites. The overall risk is very small.
Abnormal results can indicate:
Your provider may recommend this test to look for the cause of:
This test can also be used to:
Pasricha PJ. Gastrointestinal endoscopy. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 134.
US Preventive Services Task Force, Bibbins-Domingo K, Grossman DC, et al. Screening for colorectal cancer: US Preventive Services Task Force recommendation statement. JAMA. 2016;315(23):2564-2575. PMID: 27304597
Vargo JJ. Preparation for and complications of GI endoscopy. In: Feldman M, Friedman LS, Brandt LJ, eds. Sleisenger and Fordtran's Gastrointestinal and Liver Disease: Pathophysiology/Diagnosis/Management. 10th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 41.
Review Date: 1/19/2018
Reviewed By: Jenifer K. Lehrer, MD, Department of Gastroenterology, Aria-Jefferson Health Torresdale, Jefferson Digestive Diseases Network, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
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