Plasmacytoma of the large bowel: a review of the literature and a case report of multiple myeloma involving the rectosigmoid.

Large bowel involvement is a rare manifestation of plasma cell tumors, especially in association with multiple myeloma. A review of the world literature reveals only 21 reported cases, the majority of which are classified as the solitary form of the disease. A case of multiple myeloma with rectosigmoid involvement is herein presented, and the radiological findings of reported cases are summarized.