Q. A 54-year-old P3L3 woman comes to her gynecologist for vaginal bleeding for the past 1 month. She denies any vaginal pain or trauma and is not on any medication. She is sexually active with her husband. She attained menopause 3 years ago. She is a nonsmoker and nonalcoholic. Her temperature is 98.6°F (37°C), pulse is 88/min, blood pressure is 130/90 mmHg, and respirations are 14/min. BMI is 31 kg/m2. Physical examination is unremarkable. A transvaginal ultrasound shows an endometrial thickening of 9 mm. Which of the following statements is false about the disease that the patient most likely suffering from?