My left kidney is smaller than my right kidney according to a sonogram I had a year ago; the report said mild cortical atrophy bilateral. I never did a follow up because it said mild, and I have no health insurance. Well it has been a year and was wondering if this is something I should even worry about with no symptoms of any kidney problems.

The ultrasound was due to see if I had a blood clot because my right foot was swelling.

I am female 47 and in good health, not over weight.