Protein pattern of cerebrospinal fluid in various neurological diseases.

CSF/serum albumin and immunoglobulin G ratios were determined in 520 patients suffering from various neurological diseases. Blood-brain barrier impairment was detectable in most cases of spinal tumour, meningitis, Guillain-Barré syndrome and in two-thirds of the patients with cerebral infarctions. A local IgG formation in the CNS has to be assumed for some cases of meningitis considering the course of the protein dysequilibrium. Autochthonous IgG production together with a barrier dysfunction was found in patients with encephalitis, meningoradiculitis and neurosyphilis. In cases of multiple sclerosis local IgG formation in the CNS was the predominant finding.