A Rare Case of Small Bowel Extramedullary Plasmacytomas Presenting With Intestinal Obstruction

Extramedullary plasmacytoma (EMP) is a plasma cell disorder involving soft tissues in the absence of clonal bone marrow involvement or destructive bone lesions. When present in the gastrointestinal (GI) tract, and specifically the small intestine, it can cause a wide range of symptoms including GI bleeding, obstruction, and abdominal pain. The diagnosis is challenging, as it can hold an indolent course, and is infrequently encountered in clinical practice. Diagnosis requires biopsy of the involved organ, which can be obtained during surgery or endoscopy, and other workup to rule out systemic disease and bone marrow involvement. Treatment depends on the primary site of disease involvement and the presence of other features of systemic disease. We report a case of multiple small bowel plasmacytomas in a 51-year-old female who presented with small bowel obstruction. She eventually underwent surgical resection and is currently on chemotherapy awaiting stem cell transplant.