reversal sign
White
cerebellum sign • Anoxic brain injury - Ganzer Fall bei Radiopaedia
White
cerebellum sign • Dense cerebellum sign - Ganzer Fall bei Radiopaedia
White
cerebellum sign • White cerebellum sign - Ganzer Fall bei Radiopaedia
White
cerebellum sign • White cerebellum sign of hypoxic-ischemic brain injury - Ganzer Fall bei Radiopaedia
White
cerebellum sign • Hypoxic-ischemic brain injury - Ganzer Fall bei Radiopaedia
White
cerebellum sign • White cerebellum sign of hypoxic-ischemic brain injury - Ganzer Fall bei Radiopaedia
White
cerebellum sign • Hypoxic brain injury - white cerebellum sign - Ganzer Fall bei Radiopaedia
White
cerebellum sign • Diffuse hypoxic ischemic brain injury - Ganzer Fall bei Radiopaedia
White
cerebellum sign • Pediatric hypoxic ischemic encephalopathy - Ganzer Fall bei Radiopaedia
Severe
hypoxic - ischaemic brain injury: the reversal, the pseudo-subarachnoid haemorrhage and the white cerebellum signs on CT. Reversal sign: unenhanced brain CT showed diffuse increased attenuation of the white matter (arrows) and decreased attenuation of the gray matter including cortex, basal ganglia and thalami (curved arrows).
White
cerebellum sign • White cerebellum sign - Ganzer Fall bei Radiopaedia
White
cerebellum sign • Global hypoxic ischemic encephalopathy - Ganzer Fall bei Radiopaedia
Severe
hypoxic - ischaemic brain injury: the reversal, the pseudo-subarachnoid haemorrhage and the white cerebellum signs on CT. Reversal sign: unenhanced brain CT showed diffuse increased attenuation of the white matter (arrows) and decreased attenuation of the gray matter including cortex, basal ganglia and thalami (curved arrows).
Severe
hypoxic - ischaemic brain injury: the reversal, the pseudo-subarachnoid haemorrhage and the white cerebellum signs on CT. Reversal sign: unenhanced brain CT showed diffuse increased attenuation of the white matter (arrows) and decreased attenuation of the gray matter including cortex, basal ganglia and thalami (curved arrows).
Severe
hypoxic - ischaemic brain injury: the reversal, the pseudo-subarachnoid haemorrhage and the white cerebellum signs on CT. White cerebellum sign: there is a diffuse decrease in density of the supratentorial brain parenchyma (curved arrows) and increased attenuation of cerebellum (arrows).
Severe
hypoxic - ischaemic brain injury: the reversal, the pseudo-subarachnoid haemorrhage and the white cerebellum signs on CT. White cerebellum sign: there is a diffuse decrease in density of the supratentorial brain parenchyma (curved arrows) and increased attenuation of cerebellum (arrows).
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 .
Epidemiology
It is associated with:
- severe head trauma
- birth asphyxia
- drowning
- status epilepticus
- bacterial meningitis
- encephalitis
- post-cardiac arrest hypoxia
Pathology
There are different theories proposed for this sign:
- raised intracranial pressure causes partial venous obstruction resulting in distension of deep medullary veins
- preferential flow to posterior circulation
- transtentorial herniation partially relieving the increased intracranial pressure and thus increase perfusion of central structures
Siehe auch:
Assoziationen und Differentialdiagnosen zu reversal sign:
