If you do not show any cysts by age 30, it is unlikely that you have Adult Type Polycystic Kidney Disease (ATPCKD). If you have an ultrasound at age 40, and there is no cysts, then you can be very sure that you do not have the disease. It is possible to have genetic testing as well, but this is very expensive. I would recommend that you continue to consult with your physician and perhaps have a repeat ultrasound at age 40. As long as you maintain your current health with normal blood pressure and lead a healthy lifestyle, there is no other treatment for ATPCKD.