Nothing to worry about the
kidney cysts. They are age related changes in kidney. Usually seen in elderly people. Prostate volume cut off is 25 cc. Your father has 41 cc. So it is increased in size. Again nothing to worry about it. Currently no need of any treatment for both if he has no urinary symptoms.
Next Steps
Do a
RFT,
electrolytes, Urine routine, PSA test to make sure everything is good
Health Tips
consult a Nephrologist with reports