Bladder infection. My father's age?

Hi, My father got urinary infection for couple of days. When checked with doctor, they advised to take a USG scan. After checking the reports doctor said there is some form of cyst(i am not sure about the exact name) and advised us to undertake an operation by which the cyst can be removed. Urology Doctor says it is risk less. But we are having fear on my father's age. Scan report: 1. Benign prostatic hypertrophy with mild intravesical bulge, 2. Associated cystitis seen. 3. Bilateral mild hydronephrosis seen. 4. Normal sonographic study of liver gall bladder, spleen,pancreas, and RIF. Could anyone suggest if it is safe to have an operation considering my father's age? Or is there any medication which can solve the issue without operation.? Note: My father had TB problem so many years ago but it was diagnosed. Recently, Urology Doctor asked us to take a test to confirm if he is free from tb now, and results showed he is free. Please provide your valuable suggestions. Thanks a lot.