Very large left frontal mass measuring approximately 9.1 x 7.0 x 6.3 cm. It has high T2 signal with loss of grey-white differentiation and gyral expansion. It appears very heterogeneous on FLAIR, studded with numerous small cystic spaces, and has mildly heterogeneous low T1 signal. It crosses the midline via an expanded corpus callosal genu. There is a small amount of surrounding high FLAIR signal. No diffusion restriction. No definite enhancement. At the inferolateral aspect of the mass is some intrinsic T1 signal, likely haemorrhage with corresponding susceptibility artefact and precontrast hyperdensity on the CT. No increased CBV. MRS demonstrated low NAA and reversal of the normal choline-creatine ratio.