Abstract
Albumin and immunoglobulin G (IgG) were determined in cerebrospinal fluid (CSF) and serum, and the CSF/serum albumin Index (CSF X 10(3)/serum albumin concentration ratio) and IgG Index [(CSF/serum IgG)/(CSF/serum albumin)] were calculated. Data for these indices and oligoclonal banding are described in 23 cases of multiple sclerosis (MS), 19 of systemic lupus erythematosus (SLE), eight of sarcoidosis, 48 cases of miscellaneous disease, and 25 control patients with nonspecific complaints. Of the MS, SLE, and sarcoidosis patient groups, 8.5%, 26%, and 12.5% showed an abnormally high CSF/serum albumin Index; 87%, 16%, and 0% an increased IgG Index; and 87.5%, 42% and 0% showed positive oligoclonal banding. IgG Index and oligoclonal banding results for MS patients differed significantly from the sarcoidosis (p less than .001) and SLE (p less than .05) groups. When the CSF/serum albumin Index is considered also, the control and sarcoidosis patient results differ significantly from the MS group (p less than .001 and p less than .01). A strong correlation between the IgG Index and oligoclonal banding is implicated.
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