Fortunately, your kidney sizes are still preserved although you have had kidney infection (bilateral pyelonephritis) for years. Those isolated hyperechoic foci could be renal parenchymal calcification (nephrocalcinosis) due to chronic, recurrent kidney infection versus bilateral nephrolithiasis (kidney stones). You should have a blood test for serum calcium and a plain CT scan of the kidneys.
Answered 3/17/2023
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