[Diagnostic significance of cerebrospinal fluid IgG determination by radial immunodiffusion].

The concentration of immunoglobulin G in 455 cerebrospinal fluids has been determined. The results obtained are discussed together with the corresponding total protein and gamma-globulin values. Classification by seven constellations and their assignment to four groups of diseases (acute and inflammatory diseases, chronically inflammatory diseases, E. d., and tumors) allows valuable information to be obtained about the diagnostic significance of IgG determination in the cerebrospinal fluid. This is true especially of E. d. and also applies to an assessment of the activity of inflammatory processes. It is evident from the results of these studies that an evaluation of the IgG value is not possible without considering the total content of protein. The value found for the quotient (see article).