A lower GI endoscopy is a diagnostic procedure used by your doctor to inspect the inside of your rectum and colon. While it's considered a surgical procedure, endoscopy does not involve an incision.
Instead, your doctor will pass a flexible tube, called an endoscope through your anus and into your rectum and colon. This tube has a tiny video camera mounted on its tip.
It also contains a small tool used for taking tissue samples. Your doctor can use the endoscope to inspect the entire lower half of your digestive system.
In some cases, the shape of the colon makes it impossible to pass the endoscope as far into the body as the doctor would like.
Your doctor may decide to take a series of x-rays - or even to perform surgery - in order to inspect the hidden area.
Reasons for undergoing a lower GI endoscopy vary. You may have been suffering from one or more of a number symptoms - including blood in your stool, weight loss, chronic irregularity or other problems associated with the digestive system.