Late-presenting congenital anterior urethral diverticulum causing renal impairment in a male child

We report the case of a 6-year-old boy who presented with lower urinary tract obstruction and chronic renal impairment due to a delayed diagnosis of isolated CAUD. The diagnosis was eventually made by voiding cystourethrography, which revealed a large anterior diverticulum. This case illustrates a rare late presentation of CAUD with significant renal dysfunction, highlighting a crucial diagnostic pitfall. Clinicians should actively consider and investigate for anterior urethral diverticulum in any male child presenting with unexplained renal insufficiency or voiding symptoms, as early detection is essential to prevent irreversible upper urinary tract damage.