With regard to the IDH mutational status, IDH wildtype gliomas were significantly more common in tumors with visible 5-ALA (n = 2 of 7 fluorescing tumors; 29%) as compared to non-fluorescing tumors (n = 3 of 52 non-fluorescing tumors; 6%; p = 0.04). The gene discussed is IDH1; the disease is central nervous system cancer.