Bilateral kidneys are normal in sizes and smooth in contour. No hydronephrosis or renal stone is noted. Hypodense non-enhancing lesion measuring 1.3x1.7x2.2cm is noted at the mid pole of the right kidney with CT no. ~30HU on pre-contrast study, suggestive of a complicated cyst or cyst with thick content. Another smaller cyst is also noted at the right kidney.