A Case of cStage Ⅲ Esophagogastric Junction Adenocarcinoma That Showed pCR to Preoperative Chemotherapy Containing SOX

A 68-year-old man was diagnosed with esophagogastric junction adenocarcinoma, cT4a(SE)N3aM0, cStage Ⅲ. Because "bulky N" was present, he was administered 2 courses of preoperative chemotherapy containing S-1 plus oxaliplatin(SOX). Both the primary tumor and enlarged lymph nodes had greatly decreased in size following chemotherapy, and total gastrectomy and lower esophagectomy with D2 lymphadenectomy were then performed. Histopathological examinations showed no residual cancer cell both in the primary lesion and dissected lymph nodes; thus, the efficacy of the chemotherapy was Grade 3. Preoperative chemotherapy containing SOX could be one of the useful treatment options for gastric cancer patients with extensive lymph node metastases including "bulky N".