NCIt definition : Infection of the brain or spinal cord by Treponema pallidum. It occurs many years
following the original infection which remained untreated. Signs and symptoms include
abnormal gait, blindness, depression, paralysis, seizures and dementia.;
Alternative definition : NICHD: Infection of the brain or spinal cord by Treponema pallidum; it most commonly
occurs in the tertiary stage but may occur at any stage.;