I would suggest that you first consult with your primary care physician (PCP) and have a repeat scan to follow up the previous complex cyst. If the scan can be compared with your previous scan, this may be re-assuring that the cyst has not changed and is a benign cyst. If there has been a change, then further testing and evaluation by a urologist may be necessary. I would also suggest that you have urine testing for blood, protein and infection, in addition to your blood testing for creatinine and estimated glomerular filtration rate (eGFR). I would suggest that you evaluate the cyst first and then see whether consultation with a nephrologist is necessary.
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