The expression of MAOB, IL4I1, ALDH3A2, WARS2, HAAO, AANAT, IDO1, OGDH, EHHADH, AOC1, INMT, HADHA, ALDH9A1, ALDH2, ECHS1, AADAT, ALDH1B1, CAT, HADH, GCDH, MAOA, IDO2, TPH1, and CYP1B1 was higher in glioma than normal brain tissue samples. The gene discussed is ECHS1; the disease is glioma.