OBJECTIVETo investigate the clinical and pathological features of patients with concurrent gastric adenocarcinoma and primary gastric mucosa-associated lymphoid tissue (MALT) lymphoma.

METHODSA 77-year-old man referred to Beijing Cancer Hospital for the evaluation of two primary cancers of stomach revealed by gastroscope was reported. The English literature was retrieved and analyzed.

RESULTSTotal gastrectomy was performed. Histological examination confirmed that the gastric body lesion was consistent with advanced poorly differentiated adenocarcinoma, while the lesion at the fundus with low grade MALT lymphoma. A systematic review of literature in English was performed, and 40 similar patients from 12 studies were found. There were 25 males(61.0%). More patients with adenocarcinoma were at early stage (65.9%) and the majority of lymphoma was low grade (82.9%). Furthermore, most of the patients experienced Helicobacter pylori infection (72.5%). As for therapeutic strategy, most of the patients underwent subtotal or total gastrectomy.

CONCLUSIONSConcurrent gastric adenocarcinoma with MALT lymphoma is rare. The characteristics of these tumors are still unclear. The majority of gastric adenocarcinoma is at early stage, and most of the patients have Helicobacter pylori infection. The treatment is mainly based on gastric adenocarcinoma.