Some other circRNAs (e.g., circEPHB4, circCPA4, circ-MAPK4, circ-POSTN, circNFIX, circSCAF11, circ-U2AF1 and circLGMN are also associated with poor patient prognosis in glioma (44, 52, 54, 56, 60, 62, 73, 83). Here, MAPK4 is linked to glioma.