Sigmoidoscopy (IMAGE) NIH/National Cancer Institute Caption In a sigmoidoscopy, a sigmoidoscope is inserted through the anus and rectum and into the sigmoid colon. The inset shows a patient on a table having a sigmoidoscopy. Credit Terese Winslow (artist), Source: National Cancer Institute Usage Restrictions This image is copyright protected. Any use of this image is subject to prevailing copyright laws. U.S. Government has reuse rights. Please contact the rights holder of this image for permission requests. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.