Trans men who have not had a hysterectomy .
Who take testosterone are at increased risk for endometrial cancer because androstenedione , which is made from testosterone in the body , can be converted into estrogen , and external estrogen is a risk factor for endometrial cancer .
Trans men who have not had a hysterectomy and who take testosterone are at increased risk for endometrial cancer because androstenedione , which is made from testosterone in the body , can be converted into estrogen , and external estrogen is a risk factor for endometrial cancer .