Mantle Cell Lymphoma Presenting with Severe Upper GI Bleeding.

Abstract Although it usually involves extra-nodal sites such as gastrointestinal tract in more than 80% of case, Mantle cell lymphoma is considered a rare cause of gastrointestinal bleeding, especially a severe and life-threatening bleeding. We are reporting a 60 year old man, known to have peptic ulcer disease, who presented with a severe upper GI bleeding and found to have large gastric ulcer, which diagnosed as primary gastric mantle cell lymphoma.