Large intra-axial mass in the left cerebellar hemisphere with multilobulated peripheral enhancement, and central non-enhancing area. Central non-enhancing component shows high signal on T2 weighted sequence, partially suppresses on FLAIR, and does not demonstrate increased diffusion restriction relative to brain parenchyma. Patchy blooming on susceptibility sensitive sequences suggests presence of blood products (and therefore haemorrhage) within the mass. No flow voids. No involvement of the 4th ventricle or foramina of lushka. Surrounding non-enhancing abnormal FLAIR hyperintensity in the left cerebellar hemisphere extending into the left middle cerebellar peduncle.
MRS demonstrates elevation of choline:creatine ratio, depressed NAA peak, and a large lactate peak within the tumour.No convincing elevation of rCBV.
Mass effect in the posterior fossa causes displacement and partial effacement of the fourth ventricle. Third and lateral ventricles are not particularly dilated. No evidence of transependymal fluid shift.
No other intra- or extra-axial abnormality is demonstrated.