[Vesicosphincteric disorders and neurosyphilis].

Voiding disorders secondary to neurosyphilis have now become rare. The authors report a case of a patient with arthritis of the knee associated with dysuria and chronic urinary retention. Urethrocystography showed a large bladder with post-voiding residual urine. Urodynamic assessment revealed detrusor areflexia. The aetiological diagnosis was neurosyphilis. Serological tests for sexually transmitted diseases must be systematically performed in patients presenting with idiopathic voiding disorders.