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BACKGROUND The goal was to clarify the changes of TEG parameters in patients with uterine fibroids and endometrial cancer and the clinical diagnostic values of TEG parameters. METHODS A total of 57 patients with uterine fibroids and 43 patients with endometrial cancer were included, and their TEG parameters were analyzed and compared with 45 healthy women. Routine coagulation indicators were also collected and compared. For significantly changed TEG indicators, the ROC curves were used to evaluate their diagnostic efficacy and determine the cutoff values. The TEG indicators of patients with endometrial cancer of stag I and II were also compared. RESULTS APTT, and PT levels in endometrial cancer patients were significantly shorter than those in healthy controls. FIB level in endometrial cancer patients were significantly higher than those in healthy controls. Angle, MA, CI, E, G, and TPI levels were significantly upregulated in endometrial cancer patients while TMA was significantly decreased. According to ROC curve analysis, G and E had a good auxiliary diagnostic efficiency for the detection of uterine fibroids (cutoff value 6,691 d/sec and 133.8 d/sec) and TPI has good sensitivity and specificity for the diagnosis of endometrial cancer (cutoff value 51.3 dyn/cm2). The TEG index of patients with stage I and II endometrial cancer did not reach statistical difference. CONCLUSIONS Thromboelastography parameters change significantly in patients with endometrial cancer and uterine fibroids.