How to distinguish vascular origin, cytotoxicity, and interstitial cerebral edema?

Cerebral edema is divided into vasogenic cerebral edema, cellular edema and interstitial cerebral edema

Cerebral edema is divided into vasogenic cerebral edema, cellular edema and interstitial cerebral edema

Also known as hydrocephalus hydrocephalus, it is common in obstructive hydrocephalus
.
Different etiologies cause obstructive hydrocephalus, which enlarges the ventricular system, especially the lateral ventricle, causing the intraventricular pressure to be significantly higher than the pressure in the brain tissue
.
Produce intraventricular-brain tissue pressure gradient, this significant difference in pressure gradient allows intraventricular fluid to penetrate the ventricular ependyma to the brain tissue around the ventricle, forming periventricular white matter brain edema
.
The following picture shows a patient with obstructive hydrocephalus.
The bilateral lateral ventricles are significantly dilated, and a crescent-shaped long T2 edema zone can be seen next to the anterior horn of the lateral ventricle .
In the DWI sequence, the medulloblastoma tissue cells are tightly arranged, showing typical high signal T1 enhancement.
The sagittal focus of the fourth ventricle showed mild uneven enhancement.
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