Figure 12.

Axial post-mortem CT image of the brain in an elderly female patient with known dementia. There is loss of the normal grey–white matter differentiation as a result of normal post-mortem fluid redistribution and autolysis. The mild early putrefactive gas changes are demonstrated (white arrows). The hyperdensity in the dural venous sinuses posteriorly (black arrows) is a normal post-mortem-dependent lividity appearance and should not be misinterpreted as pathological acute subdural haemorrhage or pathological dural venous sinus thrombosis. Note the chronic frontotemporal lobar degenerative brain parenchymal features in keeping with the antemortem diagnosis of frontotemporal dementia.