Atypical Presentation of Neurosyphilis.

Five cases of neurospyhilis with atypical manifestation have been reported. Of these four cases presented as acute neurological illness and showed variable recovery after antisyp'iiilitic therapy. One of these cases had parinaud sip which was unaffected by treatment One case presented as dementia and gave poor response to therapy. In only one of these five cases was reagin in CSF demonstrated. Lange's colloidal gold test was negative in all. As such failure to demonstrate reagin in CSF does not rule out the diagnosis of neurosyphilis. In an antibiotic era patients may inadvertently receive some antibiotics prior to presentation to a clinician and therefore are unlikely to present with typical neurological and laboratory findings.