There are several small echogenic non-shadowing foci within superficial renal parenchymal cortex. No echogenic focus in the renal sinus. No hydronephrosis. Right kidney measures 10.2 cm in length. There is an exophytic anechoic cyst protruding from the superior renal pole measuring 10x8x8 mm. Left kidney measures 10.1 cm length. No calculus, hydronephrosis or parenchymal abnormality. Normal appearance of the urinary bladder with normal bilateral ureteral jet. No bladder wall mass or calculus is seen. 16 cc post-void bladder residual. Impression: No renal calculus or hydronephrosis Few small nonspecific echogenic foci within renal cortex, possibly small cortical calcifications but not representing renal calculi 10 mm right renal cyst Small post-void bladder residual Can you please explain?