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Conversion surgery has been reported but few cases have undergone surgical R0 resection after second-line chemotherapy. We report a case of an unresectable locally advanced gastric cancer in a patient who finally underwent the operation (R0) after second-line chemotherapy. The 77-year-old male was diagnosed with gastric cancer (cT4 [SI; Skin, Liver] N0M0 c Stage IIIA) with invasion to the skin of the abdominal wall, and chemotherapy was initially performed because of his poor performance status and due to the large defect in the abdominal wall that might occur if an operation was performed. Partial response (PR) was observed after S-1+CDDP (SP) therapy, which was then stopped after which progressive disease (PD) was observed. Ramucirumab+Paclitaxel (RAM/PTX) therapy was chosen as second-line therapy, and PR was obtained again, following which total gastrectomy was performed (D2 dissection of lymph nodes, Roux-en-Y reconstruction, and combined resection of the partial skin and the affected region of the liver). At 30 months postoperatively, no recurrence has occurred and the patient is alive after the operation without chemotherapy. [ABSTRACT FROM AUTHOR]