INSM1 and Gliosis: The sensitivity and specificity of the negative staining for the diagnosis of gliosis were as follows: EGFR—100% sensitive, 32.8% specific; MEOX2—97.7% sensitive, 37.5% specific; SOX11—79.5% sensitive, 46.6% specific and INSM1—97.7% sensitive, 47.8% specific.