An early sign that someone may have endometrial cancer is abnormal vaginal bleeding. Additionally, some people might have pelvic pain or unexplained weight loss. Typically, the bleeding is the first sign of cancer, and other symptoms might show up later if you don’t get treatment early on. These are not all of the symptoms of endometrial cancer and they could be caused by other conditions. These symptoms could be easily overlooked, so it is important to talk to your doctor about any symptoms of concern as soon as they arise.