胃癌術後9年目の孤立性骨格筋転移に対し根治切除し得た1例

抄録

A 50-year-old woman underwent distal gastrectomy for gastric cancer 9 years ago. On histopathology, a primary poorly-differentiated adenocarcinoma (T4, N0, CY1, P0, Stage IV) was diagnosed. The patient received 4 courses of S-1 combined with cisplatin for adjuvant chemotherapy. She noticed a tumor on the upper abdominal wall 9 years after the initial surgery. Computed tomography showed a thickened area in the right rectus abdominis muscle and fluorodeoxyglucose positron emission tomography showed uptake in the same area. Adenocarcinoma was diagnosed with biopsy. Further examination did not reveal any other metastasis. Staging laparoscopy revealed no peritoneal metastasis and abdominal cytology result was negative. We therefore diagnosed recurrent gastric cancer with metastasis to the abdominal wall. The patient received 4 courses of S-1 combined with oxaliplatin. Tumor size was reduced, and surgery was then performed. The tumor and gastric cancer specimen showed similar patterns on pathological examination. Postoperatively, chemoradiotherapy was performed because of positive margins. After 7 months of follow-up, the patient has no signs of recurrence.