A well-defined rim enhancing irregular cystic lesion in the superior right cerebellar hemisphere with perilesional edema and mass effect on the fourth ventricle and brainstem. Marginal haemorrhage is noted no solid component seen.
MR spectroscopy shows no choline / NAA in the margins. Massive lipid and amino acid peaks are seen at 1.2 and 0.8.
Diffusion restriction is present.