[Value of the estimation of gliofibrillary acid protein in the diagnosis of glial tumours (author's transl)].

Glial Fibrillary Acidic Protein (G.F.A.P.) is characteristic of astrocytes. Its estimation in a tumour fragment removed surgically may be used to confirm whether or not a cerebral tumour is glial in nature. This was confirmed here by study of 6 cases. G.F.A.P. levels were normal only in the 2 patients whose cerebral tumours were not glial. It remains to be determined whether this estimation may be used to define a particular treatment or prognosis.