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Findings of diagnostic laparoscopy after each chemotherapy cycle. (A) After 5 months of S-1 plus cisplatin with trastuzumab, several residual white nodules in the peritoneum were pathologically diagnosed as peritoneal metastases. (B) After switching to intravenous and intraperitoneal paclitaxel with S-1 and trastuzumab, these nodules became fibrotic, without evidence of malignancy.
