Mantle cell lymphoma presenting with severe upper gastrointestinal bleeding: A case report

INTRODUCTION: Although it usually involves extranodal sites such as the gastrointestinal tract in more than 80% of cases, mantle cell lymphoma is considered a rare cause of gastrointestinal bleeding, especially severe and life-threatening bleeding. PATIENT CONCERN: A 60-year-old man with peptic ulcer disease, who presented with severe upper gastrointestinal (GI) bleeding and large gastric ulcer. DIAGNOSIS: Primary gastric mantle cell lymphoma. INTERVENTIONS: He was treated conservatively with blood transfusion and started on Traneximic acid for 3 days. Then, the patient underwent urgent hemostatic radiotherapy. OUTCOMES: The patient became stable and kept in the hospital for monitoring with a definite diagnosis of stage IV Mantle cell lymphoma is made. CONCLUSION: Mantle cell lymphoma should be kept in mind when assessing massive upper GI bleeding, as an unusual cause of bleeding gastric ulcer, given that bleeding is an uncommon presenting feature of GI lymphoma.