[Malignant tumor-like abdominal lymphoma in Whipple's disease].

A 43-year-old man had severe upper abdominal pain and weight loss of 8 kg for over three months. He underwent a laparotomy because, computed tomography having revealed numerous mesenteric and para-aortic lymph nodes, a malignant lymphoma was suspected. Histological examination of a mesenteric lymph node demonstrated exclusively extraintestinal Whipple's disease. The symptoms completely disappeared after the administration of 1.2 mega U penicillin G and 1 g streptomycin daily for 14 days, followed by twice daily 160 mg trimethoprim and 800 mg sulphamethoxazole.