Abstract
A 63-year-old man was admitted. During hospitalization in our cardiovascular internal medicine department, anemia was identified. Abdominal CT showed a large tumor mass from the gastric fundus, centered on the posterior wall of the gastric corpus, and invasion of a tumor from the tail of the pancreas body 10 cm in size was suspected. On upper gastrointestinal endoscopy, a large Borrmann 1 tumor measuring 10 cm in diameter was observed on the greater curvature side of the cardiac portion, and the result of the biopsy was a diagnosis of poorly differentiated adenocarcinoma. Surgically, from the diagnosis of advanced gastric carcinoma, a D2 dissection, with total gastrectomy and pancreatosplenectomy, was performed. The histopathological findings were UM, Borrmann 1, T4, N3, H0, P0, CY0, pStage IIIC, and upon performing an immunohistological examination, it was shown that vimentin, Ki-67, CD3, CD5, CD68 (KP-1) and CD99 were positive, so a diagnosis of primary gastric undifferentiated pleomorphic sarcoma was reached. Primary gastric undifferentiated pleomorphic sarcoma is an extremely rare condition, and we herein report this case, with pertinent bibliographic considerations.
