IDH1 and astrocytoma (excluding glioblastoma): In addition, astrocytomas IDH-wildtype and IDH-mutant showed similar frequencies (9.7 and 12.4% respectively), slightly different from the results reported by Iuchi and co-authors (13.7% of astrocytomas IDH-wildtype and 6.7% of astrocytomas IDH-mutant) and Tabouret et al., (11% astrocytomas IDH-mutant and 5.3% of astrocytoma IDH-wildtype) [32, 33].