Endometrial carcinoma (EC) is one of the most common gynecologic malignancy in China. EC is staged surgically according to the International Federation of Gynecology and Obstetrics (FIGO) system, including depth of myometrial invasion, cervical invasion, and the presence of lymph node metastases. The benefit of lymph node resection on the prognosis of low-risk EC patients is not definite. An accurate staging method preoperative is needed.The purpose of this study is to evaluate the effect of simultaneous hybrid PET/MRI in EC preoperative staging.