Journal
SURGERY TODAY
Volume 44, Issue 1, Pages 11-21Publisher
SPRINGER
DOI: 10.1007/s00595-013-0529-1
Keywords
Gastric cancer; Neoadjuvant chemotherapy; Evidence; Clinical trial
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Adjuvant chemotherapy aims to eradicate micrometastatic tumor cells before and after curative surgery. Many Phase III trials have been conducted to study the efficacy of postoperative adjuvant chemotherapy; however, most trials have failed to show any survival benefit because of their low statistical power and/or poor patient compliance. Since 2000, two pivotal Phase III trials, the ACTS-GC and the CLASSIC, have demonstrated the efficacy of postoperative adjuvant chemotherapy following D2 gastrectomy. Although treatment with S-1 for 1 year or combination therapy with capecitabine and oxaliplatin for 6 months is effective, more intensive chemotherapy is necessary to further improve the survival rates. In Europe, two Phase III trials, the MAGIC and the FNCLCC/FFCD, have produced results that strongly suggest that neoadjuvant chemotherapy is beneficial. The advantages of neoadjuvant chemotherapy include a high rate of R0 resection, tumor regression, high compliance and the avoidance of unnecessary surgery. The disadvantage of neoadjuvant chemotherapy is over-diagnosis. In Japan, the Japan Clinical Oncology Group has conducted several clinical trials using neoadjuvant chemotherapy to target extensive nodal disease and/or scirrhous carcinomas. The optimal courses and regimens of neoadjuvant chemotherapy should, therefore, be clarified in the future.
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