The GFR of 52ml/min/1.73m2 is low. The normal GFR should be 100ml/min/1.73m2.
Roughly percentage wise both your kidneys are functioning at 52%.
This is because the cysts are obstructing the kidney ducts.
The cysts can be drained by puncturing with needle which is ultrasound guided.
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I editted the post right away , I think you read the first one please see the editted one. It was a mistake.