Endometrial cancer is the most common gynecologic cancer. It has a lifetime risk of 2.4% in white women. Risk factors include obesity, late menopause, diabetes, and unopposed estrogen exposure. Diagnosis is usually made with endometrial biopsy. Treatment involves hysterectomy, bilateral salpingo-oophorectomy, and lymph node dissection. Adjuvant radiation and/or chemotherapy may be used in high risk cases. With early stage diagnosis, endometrial cancer has a good prognosis.