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Studies from the Surveillance, Epidemiology, and End Results (SEER) database have investigated the survival impact of postoperative radiotherapy (PORT) since publication of the INT0116 results,5, 14, 15 but none have examined the use of Pre-RT. Thus, the objective of the current study was to examine the outcomes of patients in the with gastric cancer in the SEER database who received Pre-RT. Data were obtained from the SEER limited-access database. In the SEER-17 Registries, the 2008 release of the public use dataset from 2000 and 2006 was queried to identify patients with nonmetastatic gastric cancer who underwent resection. Initially, 12,995 patients were identified. Patients who were included in the analysis were aged ��20 years, had American Joint Committee http://www.selleckchem.com/products/AC-220.html on Cancer (AJCC) (sixth edition) stage I through M0 IV disease (according to the sixth edition of the AJCC Cancer Staging Manual), received either PORT, Pre-RT, or no RT (N0-RT), and had the histologic subtypes adenocarcinoma (not otherwise specified [NOS], intestinal type, mucinous or mucin-producing, mixed cell or with mixed subtypes, tubular, and papillary) or carcinoma (NOS, diffuse type, and signet ring cell). All tumor characteristics were derived from pathologic analysis. Patients were excluded from the analysis if they survived for http://www.selleck.cn/products/Romidepsin-FK228.html had received both Pre-RT and PORT, or if the sequence of RT and surgery was unknown. Patients also were excluded if they had the histologic subtypes squamous cell carcinoma, carcinoid, neuroendocrine tumor, small cell carcinoma, leiomyosarcoma, sarcoma, gastrointestinal stromal sarcoma, linitis plastica, adenocarcinoma in villous or tubulovillous adenoma, superficial http://www.selleckchem.com/products/nutlin-3a.html spreading adenocarcinoma, clear cell adenocarcinoma, adenosquamous carcinoma, melanoma, carcinosarcoma, rhabdoid tumors, or malignant peripheral nerve sheet tumors. All patients underwent some form of gastrectomy and lymph node dissection. Our initial query identified 12,995 patients. Patients were excluded because they were aged