Synchronous MALT lymphoma and gastric adenocarcinoma.

A 73-year-old man underwent endoscopy for iron-deficiency anemia, revealing mucosa-associated lymphoid tissue (MALT) lymphoma with staging of stage IV lymph node involvement. He received H. pylori eradication and rituximab-bendamustine, achieving lymph node regression. Follow-up endoscopy identified a 20-mm antral ulcer, histologically confirmed as well-differentiated tubular adenocarcinoma. This case highlights the rare association of MALT lymphoma and gastric adenocarcinoma.