The examination of the rectum by the use of a scope advanced into the sigmoid colon is called a __________.

The examination of the rectum using a scope that is advanced into the sigmoid colon is specifically referred to as proctosigmoidoscopy. This term encompasses the evaluation of both the rectum and the sigmoid part of the colon.

Proctosigmoidoscopy involves the use of a flexible scope that allows for visualization of the rectum and the sigmoid colon, which is crucial for diagnosing conditions such as polyps, tumors, or inflammatory diseases in both areas. The term "procto-" refers to the rectum, while "sigmoido-" pertains to the sigmoid colon, thus accurately reflecting the scope's extent of examination.

Understanding the scope of proctosigmoidoscopy is essential, particularly in clinical settings where precise coding is necessary for documentation and billing purposes. This term is distinct from other procedures that may examine only the rectum or the colon separately, reinforcing its specific applicability in the context of comprehensive evaluation in the lower gastrointestinal tract.