{Reference Type}: Case Reports {Title}: Loss of IDH mutation or secondary tumour manifestation? Evolution of an IDH-mutant and 1p/19q-codeleted oligodendroglioma after 15 years of continuous temozolomide treatment and radiotherapy: A case report. {Author}: Ehret F;Hansch A;Meinhardt J;Hain EG;Misch M;Onken J;Roohani S;Koch A;Schweizer L;Radke J;Kaul D; {Journal}: Neuropathol Appl Neurobiol {Volume}: 49 {Issue}: 1 {Year}: 02 2023 {Factor}: 6.25 {DOI}: 10.1111/nan.12859 {Abstract}: