White cerebellum sign

Last revised by Ashesh Ishwarlal Ranchod on 5 Mar 2023

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:

ADVERTISEMENT: Supporters see fewer/no ads