Bleeding from the rectum (the last part of the digestive system where stool is stored until it is passed) with or without stool.
Clinical Trials
INTERNATIONAL VERSIONS OF THE SITE
Merck & Co, Inc, Rahway, NJ, USA, known as MSD outside of the United States and Canada, provides international versions of this site for both healthcare professionals and the general public.
Select a language below to be redirected to the MSD version of the site in your chosen language.