This document discusses syphilis, a multi-system disease caused by the bacteria Treponema pallidum that can involve the nervous system. It has various stages and presentations depending on whether it was acquired or congenital. Neurosyphilis can occur in early or late stages and manifest as asymptomatic neurosyphilis, meningitis, meningovascular symptoms, general paresis, or tabes dorsalis. Diagnosis involves serology and CSF tests. Treatment is with penicillin or other antibiotics. Complications can include hydrocephalus, myelitis, and Jarisch-Herxheimer reaction.