Neurosyphilis is diagnosed by finding high numbers of leukocytes (predominately lymphocytes) and high protein levels in the cerebrospinal fluid in the setting of a known syphilis infection.
Neurosyfilis diagnosticeres ved fund af store antal leukocytter (hovedsagligt lymfocytter) og høje proteinniveauer i cerebrospinalvæske ved udbredelsen af en kendt syfilisinfektion.