Synchronous adenocarcinoma and MALT lymphoma of stomach.

We describe a patient in whom adenocarcinoma and lymphoma occurred simultaneously in the stomach. She presented with pain and lump in the epigastrium with history of hematemesis. Endoscopy revealed a growth involving the lesser curvature, and biopsy showed poorly differentiated carcinoma. Histological examination of the gastrectomy specimen showed synchronous diffuse adenocarcinoma with primary lymphoma of MALT type. The latter entity is known to be associated with Helicobacter pylori infection.