White cerebellum sign

Case contributed by Sepehr Haghighi


Loss of consciousness

Patient Data

Age: 9 years
Gender: Male

Decreased density of supratentorial brain parenchyma, as well as bilateral symmetrical hypodensity of basal ganglia due to hypoxic-ischemic encephalopathy, is visible. 

Increased density of cerebellum and brain stem is notable which is compatible with irreversible brain damage.

Case Discussion

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 1.

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