Good Day !
1. Right Kidney - Normal
2. Left Kidney - a 1.2 cm renal cyst
with calcification - I would suggest to get a CT scan
with an IV contrast if your serum creatinine
is normal to further investigate the nature of the cyst. Majority of the time it is just a simple cysts with calcification but a CT scan will be a better imaging modality to classify and characterize the cyst.
Best of luck and Thank you.
Manuel C. See IV, MD DPBU