IDH1 and central nervous system cancer: We previously reported the characteristics of gliomas based on the 2007 WHO criteria using 18F-FDG, 11C-MET, 18F-FLT, and 18F-FMISO PET.8 However, these results might be impacted with the addition of genetic information such as IDH status (wild-type [wt] or mutation [mut]) in the 2016 WHO glioma classification.