Massive left-sided subdural haematoma with lobulated appearance with fluid-fluid levels may relate to anti-coagulation; extends along the falx cerebri and tentorium cerebelli. Severe left-to-right midline shift with subfalcine, transtentorial and cerebellar tonsilar herniation. Complete effacement of the third ventricle and basal cisterns. Loss of grey-white differentiation in the left temporal lobe. There is also a intra-parenchymal haemorrhage, probably secondary to infarct, in the right cerebellar hemisphere.