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Outcome of Antenatally Presenting Posterior Urethral Valves (PUV) in Children. BACKGROUND: To analyze the outcome of children with posterior urethral valves who presented with antenatal hydronephrosis. METHODS: A 10-year retrospective review of records of 70 children with posterior urethral valves. RESULTS: The mean (SD) gestational age at diagnosis was 34 (4.48) weeks, and age at intervention was 130.5 (170.9) days. The nadir creatinine was significantly raised (<1.2 mg/dl) in children with oligohydramnios and diversion. CONCLUSION: All boys with antenatally detected hydronephrosis need postnatal evaluation to rule out posterior urethral valves. Short term outcome is improved with postnatal treatments, and longer follow-up is needed to ensure a favourable outcome.