MRI reveals features of grade 3 diffuse axonal injury with small T2 hyperintense, diffusion restricting foci at the bilateral frontal grey-white junctions, within the corpus callosum (including the splenium) and within the dorsal midbrain / superior cerebellar peduncles bilaterally. Subtle low signal blooming is appreciable on the gradient sequence at some of these locations (microhaemorrhage). Elsewhere there is evidence of less sinister traumatic injury, with right posterior and left anterior temporal lobe contusions, trace right parietal region subdural haemorrhage and trace volume subarachnoid haemorrhage with redistribution into the occipital horns of the lateral ventricles.