Axial T  ₂WI (a, c) show homogenous high signal intensity (arrows) with central attenuation on the FLAIR image (b, d), corresponding to what should be a positive T2-FLAIR mismatch sign. Top row tumour was a DNT and bottom row a neuroglial tumour.DNT, dysembryoplastic neuroepithelial tumour; FLAIR, fluid attenuated inversion recovery.