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[A Case of Gastric Cancer with Diffuse Intra-Tumoral Calcifications Showing Pathological Complete Response to Chemotherapy with S-1 plus Docetaxel].

A 70-year-old woman was diagnosed with cStage IV gastric cancer with diffuse intra-tumoral calcifications. She underwent systemic chemotherapy with an S-1/cisplatin regimen. However, as the disease progressed after 5 courses of the regimen, a secondary S-1/docetaxel regimen was administered. The target lesions showed complete response after 6 courses of this regimen, and surgery with curative intent was planned. The patient underwent total gastrectomy because no factors that would compromise the curative intent were observed during laparotomy. Postoperatively, the disease showed pathological complete response to chemotherapy.