Ferritin concentration in cerebrospinal fluid.

15 patients with psychosomatic disease, 26 patients with miscellaneous neurological diseases, and 16 patients with cerebrovascular disease were investigated with regard to concentrations of ferritin in serum and cerebrospinal fluid (CSF). The mean CSF ferritin concentration in the psychosomatic group was 6.2 micrograms/l +/- 2.4 (1 S.D.). Patients with recent cerebral infarction had similar values while 2 patients with intracerebral hematomas had very high CSF ferritin concentrations. There was a positive correlation between serum and CSF ferritin levels and between CSF total protein and ferritin in patients with a damaged blood-CSF barrier only. At present, the practical value of analysing ferritin in the CSF is very small.