Consistent with our finding of TGM2 upregulation in aggressive meningiomas, the microarray dataset GSE32197 from public GEO (Gene Expression Ominbus database, NIH, USA; http://www.ncbi.nlm.nih.gov/geo/) also revealed an 8-fold increase in TGM2 expression in anaplastic meningioma relative to low-grade fibroblastic meningioma (Figure S2 in File S1) [27]. This evidence concerns the gene TGM2 and anaplastic meningioma.