TP53 and oligodendroglioma: In the TCGA oligodendroglioma dataset, 9 out of 12 codon 273 mutations were present in the 1p/19q non-co-deleted sub-group and 3 out of 12 in the 1p/19q co-deleted sub-group; moreover, 57% (25/44) of TP53 mutant oligodendroglioma were 1p/19q non-co-deleted (total non-co-deleted samples in this dataset were n = 40).