Sigmoidoscopy: Purpose, procedure and how it compares to a colonoscopy A sigmoidoscopy is a procedure that doctors use to examine the inside of the rectum and sigmoid colon Colon and rectal surgeon Craig Messick, M D , shares what conditions a sigmoidoscopy helps diagnose and why it’s not a replacement for a colonoscopy
SIGMOID Definition Meaning - Merriam-Webster Usually, though, sigmoid is used in contexts relating to the sigmoid colon-the contracted and crooked part of the colon immediately above the rectum Sigmoid comes from sigma, the name of the 18th letter of the Greek alphabet