Inclusion Criteria: Patients who have;  Persistent hydronephrosis and Unfavorable bladder dynamics on urodynamic study performed at least one year after posterior urethral valve ablation will be included in the study. The unfavorable bladder dynamics will be defined as poor compliance or detrusor overactivity.  Exclusion Criteria: Patients who;  Underwent urinary diversion (e.g. vesicostomy or ureterostomy), Have other conditions that could affect lower urinary tract function, Have infravesical obstruction or Those who will refuse to participate in the study will be excluded.