Cases
Woman in her 70s with colon polyp   

History and images

Our appreciation is extended to Dr. Nada Shaker of the Department of Pathology, Wexner Medical Center, Ohio State University, Columbus, OH, for contributing this case.

History: A woman in her seventies with a past medical history of colon polyps presented with a 5-mm sessile polyp in the sigmoid colon. Click images to enlarge.

What is the most likely diagnosis?
Colonic adenocarcinoma
Colonic xanthoma
Muciphage

What is the etiology of colonic xanthoma?
Prior injury
Neoplastic
Infectious
Autoimmune