Elevated Testosterone

Testosterone elevated 61 years old male, 755 to 820 typically. Adrenal gland cyst is stable since 2008 been reviewed 3 sperate times on CT and in the past year. No supplements. Been cleared by Urologist and Ultrasound clear. So what drives this up and what are the top 3-5 items from a endocrinologist perspective. Cortisol level normal. What are the negatives with this problem at older age.