hello doctor, my father had ultrasound last week. Here are the findings: cyst located superior pole right 7.5 x 6.1mm, other cortical cyst right located upper and middle third 9.8 x 6.9mm and 12 x 10 mm, septated cyst interpolar region left kidney 17 x 13.7mm. Right kidney 10.6 x 3.4 cm, left kidney 11.3 x 4.8 cm. Renal cortices normal in thickness. new cyst upper pole left 12 x 11mm is seen. IMPRESSION: Bilateral cortical cysts . Is this harmful? What is our intervention for this?