[A Case of Gastric Neuroendocrine Carcinoma, Small Cell Type with Multiple Synchronous Liver Metastases-15 Years of Survival Following Successful Chemotherapy].
A man in his 70s underwent an upper gastrointestinal series during a routine medical check-up, which revealed an abnormality in the stomach. Subsequent investigations, including computed tomography, endoscopy, and pathological examination, confirmed the diagnosis of gastric neuroendocrine carcinoma, a small cell type with multiple synchronous liver metastases(cT3[SE]N1H1PXM0, Stage Ⅳ). Following a comprehensive treatment involving 35 courses of S-1+CDDP chemotherapy, the primary lesion and multiple liver metastases resolved. For the next 8 years, the patient continued maintenance therapy with S-1 alone. The patient has survived for 15 years without recurrence.