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Objeetive: NSCLC are particularly aggressive tumors, with high invasive properties and metastatic potential.About 40% stage Ⅰ and 60% stage Ⅱ NSCLC patients are dying of distant metastases within 5 years after curative tumor resection.Aberrant expression of Testicular orphan receptor 4 (TR4) has been shown to regulate biologic processes around solid tumors.However, it is not clear the role of TR4 in prognosis for non small cell lung cancer (NSCLC) patients and the development of NSCLC cells.Therefore, we aimed to explore the crucial role of TR4 in 293 cases of Ⅰ-ⅢA NSCLC.