White cerebellum sign

Last revised by Dr Mohamed Saber on 22 Apr 2021

White cerebellum sign, also called reversal sign or dense cerebellum sign, is encountered when there is a diffuse decrease in density of the supratentorial brain parenchyma, with relatively increased attenuation of the thalami, brainstem and cerebellum. This sign indicates irreversible brain damage and has a very poor prognosis, which is why radiologists must be aware of this sign 2.

Epidemiology

It is associated with:

Pathology

There are different theories proposed for this sign:

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Cases and figures

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