We report a case of malignant lymphoma developing in a gastric stump. The tumour was discovered 20 years after a subtotal gastrectomy. 29 such cases have been reported previously. Malignant lymphoma tended to occur sooner in patients with Billroth I anastomosis than in patients with Billroth II anastomosis. The possible relationship between malignant lymphoma and
Helicobacter pylori
infection has been presented in the literature.