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Background In recent years, conversion surgery after chemotherapy has been considered a promising strategy for improving the prognosis of patients with stage IV gastric cancer. However, there are few reports on conversion gastrectomy after second-line chemotherapy. Here, we report a case of long-term survival of a patient with liver metastases from gastric cancer who underwent conversion surgery after second-line chemotherapy with ramucirumab and paclitaxel. Case presentation A 77-year-old man complaining of weight loss was diagnosed with human epidermal growth factor receptor 2-positive gastric cancer with multiple liver metastases. Although the patient initially received trastuzumab-based chemotherapy, it was discontinued, because he experienced trastuzumab-induced infusion reactions. Thereafter, he was treated with six courses of S-1 plus cisplatin and six courses of ramucirumab plus paclitaxel as the first- and second-line regimens, respectively. The primary tumor and liver metastases remarkably shrank, and the reduction rate of the measurable metastatic liver lesions was 81.1%. According to the Response Evaluation Criteria in Solid Tumors, the patient responded partially. Therefore, he underwent total gastrectomy with D2 lymphadenectomy and partial hepatectomy of segments 3 and 4. Pathological examination revealed tumor invasion into the muscularis propria, a grade 1a histological response, and no lymph node metastases. No viable cancer cells were identified in the specimens resected from liver segments 3 and 4. Accordingly, the patient was pathologically diagnosed with stage IB (ypT2N0M0). Postoperatively, the patient received adjuvant chemotherapy with S-1 for 6 months, and he survived without recurrence for 42 months after conversion surgery. Conclusions Conversion surgery might be clinically useful for improving survival in certain patients with gastric cancer, including those who previously received second-line chemotherapy.

surgical case reports

Successful conversion surgery for stage IV gastric cancer with liver metastases after second-line chemotherapy with ramucirumab and paclitaxel: a case report