Japanese investigators randomly assigned 1,059 patients with stage II or III gastric cancer who had undergone a D2 gastrectomy to receive either 1 year of S-1, an oral fluoropyrimidine not available in the United States, or follow-up after surgery alone. Patients were randomized in a 1:1 fashion. The 3-year OS rate was 80.1% in the S-1 group and 70.1% in the surgery-only group. The HR for death in the S-1 group, as compared with the surgery-only group, was 0.68 (95% CI, 0.52-0.87; P = .003).[Level of evidence: 1iiA]
Subsequently, investigators in Asia evaluated the role of capecitabine/oxaliplatin as adjuvant therapy after gastric cancer resection. In the CLASSIC (NCT00411229) trial , 37 centers in South Korea, China, and Taiwan randomly assigned 1,035 patients with stage IIA, IIB, IIIA, or IIIB gastric cancer who had undergone a curative D2 gastrectomy to receive adjuvant chemotherapy (eight 3-week cycles of capecitabine plus oxaliplatin) or follow-up post-surgery alone. The 3-year disease-free survival rate was 74% in the chemotherapy group and 59% in the surgery-alone group (HR, 0.56; 95% CI, 0.44-0.72; P < .0001). The 3-year OS was 83% in the chemotherapy group and 78% in the surgery-alone group (HR, 0.72; 95% CI, 0.52-1.00; P = .0493).[Level of evidence: 1iiA] Further follow-up is anticipated.
Treatment options under clinical evaluation:
- Postoperative chemoradiation with ECF such as in the CALGB-80101 trial, which is now closed.
- Neoadjuvant chemoradiation therapy has been under clinical evaluation, such as in the SWOG-S0425 (NCT00335959) trial, which is now closed, and the RTOG-9904 trial, which is now completed.
All newly diagnosed patients with stage III gastric cancer should be considered candidates for clinical trials.
Current Clinical Trials
Check for U.S. clinical trials from NCI's list of cancer clinical trials that are now accepting patients with stage III gastric cancer. The list of clinical trials can be further narrowed by location, drug, intervention, and other criteria.
General information about clinical trials is also available from the NCI Web site.
Macdonald JS, Smalley SR, Benedetti J, et al.: Chemoradiotherapy after surgery compared with surgery alone for adenocarcinoma of the stomach or gastroesophageal junction. N Engl J Med 345 (10): 725-30, 2001.
Cunningham D, Allum WH, Stenning SP, et al.: Perioperative chemotherapy versus surgery alone for resectable gastroesophageal cancer. N Engl J Med 355 (1): 11-20, 2006.
Sakuramoto S, Sasako M, Yamaguchi T, et al.: Adjuvant chemotherapy for gastric cancer with S-1, an oral fluoropyrimidine. N Engl J Med 357 (18): 1810-20, 2007.
Bang YJ, Kim YW, Yang HK, et al.: Adjuvant capecitabine and oxaliplatin for gastric cancer after D2 gastrectomy (CLASSIC): a phase 3 open-label, randomised controlled trial. Lancet 379 (9813): 315-21, 2012.
Fuchs C, Tepper JE, Niedwiecki D, et al.: Postoperative adjuvant chemoradiation for gastric or gastroesophageal adenocarcinoma using epirubicin, cisplatin, and infusional (CI) 5-FU (ECF) before and after CI 5-FU and radiotherapy (RT): interim toxicity results from Intergroup trial CALGB 80101. [Abstract] American Society of Clinical Oncology 2006 Gastrointestinal Cancers Symposium, 26-28 January 2006, San Francisco, California. A-61, 2006.
Ajani JA, Winter K, Okawara GS, et al.: Phase II trial of preoperative chemoradiation in patients with localized gastric adenocarcinoma (RTOG 9904): quality of combined modality therapy and pathologic response. J Clin Oncol 24 (24): 3953-8, 2006.