Composite Gastric Cancer and Diffuse Large B-cell Lymphoma Aris- ing from the Remnant Stomach

We report the case of an 89-year-old man who developed composite gastric cancer and Diffuse Large B-Cell Lymphoma (DLBCL) arising from the remnant stomach. He had undergone partial gastrectomy for benign gastric ulcer 60 years earlier. Upper gastrointestinal series from a periodic health examination showed an ulceration in the remnant stomach near anastomotic site, and a biopsy from endoscopic examination revealed gastric cancer. He underwent total gastrectomy, and histological examination revealed composite gastric cancer and DLBCL. Lymphadenopathy was not detected on preor post-operative Computed Tomography (CT), and the cancer was considered limited. Helicobacter pylori and Epstein-Barr virus were not detected. Although composite gastric cancer and DLBCL arising from the remnant stomach is considered extremely rare, particular attention should be given to the residual stomach after partial gastrectomy.