title: An unusual cause of melena.
authors: Division of Internal Medicine, Department of Gastroenterology, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan, Republic of China.
authors: Chang-Han
authors: CH
authors: Lo
authors: Chin-Hui
authors: CH
authors: Hsu
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D016393:Lymphoma, B-Cell / Q000175:diagnosis / Q000473:pathology*; D008297:Male; D008551:Melena / Q000175:diagnosis / Q000209:etiology*; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000175:diagnosis / Q000473:pathology*; D013274:Stomach Neoplasms / Q000175:diagnosis / Q000473:pathology*