An unusual cause of lower gastrointestinal bleeding in Crohn's disease. Malignant infiltration with Epstein-Barr virus-positive diffuse large B-cell non-Hodgkin's lymphoma.

*Division of Gastroenterology, Hepatology, and Nutrition, University of Pittsburgh Medical Center, Pittsburgh; ‡Department of Medicine, University of Pittsburgh School of Medicine, Center for Womens’ GI Health, Division of Gastroenterology, Hepatology, and Nutrition/MAGEE, Pittsburgh; § Department of Medicine, University of Pittsburgh School of Medicine, Inflammatory Bowel Disease Center, Division of Gastroenterology, Hepatology, and Nutrition, Pittsburgh, Pennsylvania