Lower Urinary Tract Obstruction

A newborn boy did not void in the first 12 h of life after full-term gestational age (GA) birth. He has since voided with a marginal urine stream. Prenatal course was unremarkable and had normal imaging at 20 weeks GA. A renal/bladder ultrasound (RBUS) was obtained on day of life #1 prior to calling for consultation, which is visible below. The patient is preparing to discharge home per the NICU team at the referring hospital. He has an otherwise normal physical examination and there is no family history of urologic anomalies.