[A Case of Gastric MiNEN with Liver Metastasis without Recurrence for 3 Years after Chemotherapy and Radical Operation].

An 81-year-old man was suspected of having gastric cancer and liver metastasis based on CT findings at another hospital. Upper gastrointestinal endoscopy revealed a 50 mm ulcerative lesion on the posterior wall of the upper gastric body. A biopsy led to a diagnosis of poorly differentiated adenocarcinoma of the non-solid type(por2). Contrast CT revealed a 25 mm enlarged lymph node in the lesser curvature and a 15 mm solitary liver metastasis in S2. No other distant metastases were found. The preoperative diagnosis was U, Post, Type 2, 50 mm, por2, cT4aN(+)M1(HEP), cStage Ⅳ. Chemotherapy (TS-1, 2 courses)was administered, and stable disease(SD)was observed. Because the disease severity was controlled, laparoscopic total gastrectomy and partial S2 hepatectomy were performed. The pathological findings revealed gastric MiNEN with liver metastasis. After surgery, no chemotherapy was administered. The patient has been under observation for 3 years without any sign of recurrence.