A technique in which an instrument is inserted into the rectum and the sigmoid portion of the colon for examination to detect abnormalities.
Direct examination of the rectum and sigmoid colon with a proctosigmoidoscope, an instrument that penetrates further into the colon than a proctoscope.
Visual examination of the rectum and sigmoid colon.
A diagnostic procedure called sigmoidoscopy, which involves the visual inspection of the rectum and sigmoid colon using a medical device called a sigmoidoscope.