Background: Chronic urinary retention due to detrusor underactivity or acontractility can markedly impair quality of life and may necessitate long-term clean intermittent catheterization (CIC). Sacral neuromodulation (SNM) is an established treatment option for selected patients with refractory non-obstructive urinary retention, although evidence in adolescents and in neurologically mediated retention remains limited.

Case presentation: A 14-year-old girl with a diagnosis of neurogenic bladder had required CIC five to six times daily for two years. Assessment demonstrated a large-capacity bladder, post-void residual urine exceeding 250 mL, and no detrusor instability on urodynamic testing. Following a staged SNM trial, the patient reported improved bladder sensation and spontaneous voiding, with cessation of CIC during the trial. A permanent implant was subsequently placed.

Outcome: At three months the patient continued to void without CIC; at six months a near-normal voiding pattern without catheterization was reported. No complications were reported except occasional dysuria episodes during the documented follow-up.

Conclusion: This case illustrates a favorable short-term functional response to SNM in an adolescent with neurogenic bladdder.