The left kidney upper moiety shows moderate hydronephrosis and drains by moderately dilated tortuous ureter that ends in an ectopic location with a ureterocele.
The left kidney lower moiety shows mild hydronephrosis with a mildly dilated ureter draining orthotopically superior to ureter draining upper moiety (Weigert-Meyer rule).
There is a hyperdense calculus in lower moiety of left kidney.
Right kidney is normal. No hydronephrosis or hydroureter noted.