For example, IDH‐mutant gliomas often show T2/FLAIR mismatch and lower perfusion on rCBV imaging, while 1p/19q‐codeleted gliomas are more likely to present with calcification and less frequent T2/FLAIR mismatch compared with noncodeleted tumors [229, 230, 231, 232]. The gene discussed is IDH1; the disease is central nervous system cancer.