Rectal Cancer Images (image) Case Western Reserve University Share Print E-Mail Caption The post-chemoradiation image of rectal cancer on the left shows residual cancer that requires surgery. The image on the right shows no signs of residual cancer. Credit Case Western Reserve University Usage Restrictions please give proper credit Share Print E-Mail 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.