Anatomy-computerized tomography correlations in transtentorial brain herniation.

Area of Science:

• Neurology
• Radiology
• Medical Imaging

Background:

• Transtentorial brain herniation diagnosis historically relied on encephalography and arteriography.
• Computerized tomography (CT) offers a safer, more precise method for visualizing herniations.

Purpose of the Study:

• To evaluate the reliability of CT imaging for diagnosing transtentorial brain herniation.
• To correlate CT findings with anatomical variations in autopsy specimens.

Main Methods:

• Anatomy-CT correlation study using autopsy brain specimens.
• Examination of three types of transtentorial herniation: temporal, central, and culmen cerebelli.
• Utilized various CT reference planes, including occipito-temporal and orbito-meatal.

Main Results:

• CT reliably visualized temporal uncus herniation and perimesencephalic cistern filling.
• Central herniation diagnosis improved with the occipito-temporal plane; perimesencephalic cistern disappearance is a key indicator.
• Culmen herniation was readily assessed using the orbito-meatal plane.

Conclusions:

• CT is a reliable diagnostic tool for transtentorial brain herniation when performed with recommended techniques.
• CT accurately depicts the tentorial incisura anatomy, aiding in prognosis prediction.
• Anatomical variations in the incisura influence clinical presentation and prognosis.