<prompt> In follow up of BPH, most impoant indication of surgery isProstate size 75gmSingle episode of UTI requiring 3 day antibioticsCannot use medication due to hypeensionBilateral hydronephrosis  <response>: Indications for surgery in BPH are: Prostatism Acute retention of urine Chronic retention of urine with residual urine 200mlComplications like hydroureter, hydronephrosis, stone formation, recurrent infections, bladder changes.HematuriaReference : page 1045 SRBs manual of surgery 5th edition 