A CASE OF INTRAMUCOSAL SIGNET-RING CELL CARCINOMA IN THE GASTROPYLORUS WITH DUODENAL INVASION

Abstract

A 59-year-old-woman was admitted to our hospital for the further examination of the stomach. Endoscopic findings showed a IIc typed early gastric cancer in the gastric pylorus. Microscopic findings of the resected specimen showed a intramucosal signet-ring cell carcinoma with 1. 1 cm invasion in length into the duodenal mucosa and no lymph node metastasis. Generally, the frequency of duodenal extension by the stomach cancer is rare. In our case, it was speculated that the destruction of the mucosal structure of the duodenum by pyloric ulcer allowed stomach cancer to invade the doudenum.