[Preliminary study on immunoglobulins G in the cerebrospinal fluid of neurological patients].

The preliminary data from a study of the cerebrospinal fluid IgG of 76 neurological patients are reported. The radial immunodiffusion method was employed. The absolute and percentage increase of IgG with respect to total proteins in the various diagnostic classes involved in the series was considered. The most significant increases were encountered in M.S., in neuropathies and radiculopathies and in tumor involving the subarachnoid spaces. The high percentage is, however, characteristic of M.S. The method is thus particularly useful in diagnosing M.S. and in differentiating it from other neurological diseases.