Uterine papillary serous carcinoma (UPSC) is a relatively rare but aggressive uterine malignancy comprising approximately 10% of endometrial cancers. Many women pre-operatively misdiagnosed as having endometrioid carcinoma have ultimately UPSC on final pathology. These women receive inadequate surgical staging without omentectomy.AIM: To assess the value of omentectomy on disease-free interval and overall survival in women with UPSC who had an initial diagnosis of endometrioid carcinoma.