Clinical and CSF cyto-proteic findings in 23 patients with CSF eosinophilia.

Clinical diagnosis and cerebrospinal fluid (CSF) protein pattern were studied in 23 patients who had eosinophilic granulocytes in the CSF. Clinical data revealed that an inflammatory disorder of the central nervous system (CNS) was evident in 20 cases. A lymphoid reaction and elevated CSF total protein were found in most of the cases, but the most important finding was an increase of CSF gamma-globulin in 12 patients, of whom 10 had oligoclonal patterns. Our results may give support to a relationship between intrathecal eosinophilic reaction and inflammatory diseases of the CNS with subacute or chronic course accompanied by intrathecal synthesis of immunoglobulins.