A fecaloma is a buildup of thickened feces (poop) in the colon or rectum that gives the appearance of a tumor in the belly. The colon is the major part of the large intestine, which is located in the belly. The intestine is a tube shaped structure that is part of the digestive tract. The rectum is the last part of the large intestine. Fecaloma is also known as coproma, fecal tumor, scatoma, and stercoroma. Fecaloma comes from the Latin word “faeces” meaning “feces” and the Greek word “oma” meaning “tumor.” Put the words together and you get “feces tumor.”