Endometrioid Intraepithelial Neoplasia: An Endometrial Precancer Detected by 18F-FDG PET/CT

: The report describes a 55-year-old woman with postmenopausal abnormal vaginal spotting. PET/CT revealed focal hot F-FDG uptake in the fundus portion of the uterine cavity, and pathology of hysteroscopic dilation and curettage showed endometrioid intraepithelial neoplasia of uterine endometrium, an endometrial precancer. This case points to the significance of F-FDG PET/CT in determining the dilation and curettage site for the postmenopausal women with abnormal vaginal spotting. Increased F-FDG activity in the region of the uterus must be investigated to determine the possibilities of primary malignancies, metastases, and benign diseases.