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Effect of Preoperative Chemotherapy and Postoperative Adjuvant Chemotherapy for Gastric Cancer with Positive Peritoneal Lavage Cytology (CY1): A Retrospective Study

Background: Peritoneal metastasis is one of the most common forms of metastases for gastric cancer [1]. The 15th edition of the Japanese Classification of Gastric cancer defines patients with pos itive peritoneal lavage cytology (CY1) as stage IV gastric cancer [2-3]. Treatment options are inconclusive for patients whose peri toneal metastases are limited to CY1[4].

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