Russell bodies (RB) are rare manifestations within the lower gastrointestinal tract. To date, there are only three other reported cases of RB lesions of the colon; two were polyps, and the third was a case of a multifocal RB lesion of the gastrointestinal tract. This paper reports a case of a tubulovillous adenoma with RB of the sigmoid colon in a patient diagnosed incidentally as part of the UK National Health Service Bowel Cancer Screening Programme. A thorough hematological investigation is required to exclude hematological malignancies because of its association with plasma cell neoplasm. These lesions should undergo clonality analysis to exclude the monoclonal proliferation of plasma cells. Ideally, a bone marrow aspirate and investigations for amyloidosis should be performed to exclude underlying hematological malignancies.
Keywords: Colon; Monoclonal; Multiple mye; Polyps; sigmoid.