My father had a prostate surgery (TURP, Bipolar) in June 2018 as he was unable to pass urine (no pain or other symptoms ever before this) . At that time he had a 86gm prostate with PVRU 250 ml. His PSA was 5.59 ng/ml and his biopsy was clean (BHP with mild prostate). 7 months after the surgery, 17/2/2019, his ultrasound suggested a residual prostate measuring 39.36ml with PVRU 14.59 ml. After this the doctor gave him Dutas for 6-months. The latest ultrasound suggests a prostate of 53ml with PVRU 15 ml. He doesn't have any symptoms, no pain, no problem with passing urine. Does regrowth happen after surgery? Can the growth be paused or is another surgery the only option? Kindly suggest.