Inadvertent intrathecal administration of vincristine results in severe neurotoxicity. Motor and sensory bladder dysfunction have been reported but the long-term urologic consequences are unknown due to the associated high mortality. We report a case of accidental intrathecal vincristine administration with patient survival and follow-up of 24 months. The child developed a lower motor neuron neuropathic bladder requiring intermittent self-catheterization of the bladder. Urinary tract management of these children should be based on the urodynamic findings.