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Cerebral Herniation, cerebral neoplasm

USU Teaching File MUTF - MedPix (2000)

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Affiliation: Uniformed Services University

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The two most common types of brain herniation are the subfalcine and descending transtentorial herniation, see Diagram of herniation types enclosed... Transtentorial herniation can be either descending or ascending... The central lobule, culmen, and superior surface of the cerebellum are displaced superiorly leading to effacement of the superior vermian cistern and compression and displacement of the fourth ventricle anteriorly... With increasing displacement superiorly, the quadrigeminal cistern becomes deformed and the midbrain becomes displaced anteriorly... Other types of herniations include: transalar (transsphenoidaI), tonsillar, and miscellaneous (ie. transdural/transcranial)... The descending type occurs when the frontal lobe is displaced posteriorly over the y eater sphenoid ala, causing the sylvian fissure, horizontal middle cereberal artery, and temporal lobe to be displaced backward In the ascending type, the temporal lobe, sylvian fissure, and middle cerebral artery are displaced over the sphenoid ridge... Tonsillar herniation is usually concurrent in 2/3's of the people with the ascending transalar herniation and 1/3 of those with descending transalar herniation... The cerebellar tonsils are inferiorly displaced through the foramen magnum which can lead to compression of the brain stem and death due to respiratory depression... To identify herniation, MRI is most useful since it yields multiplanar images... With these images, the mass effect on the adjacent structures can be identified and further therapy with surgery or radiation can be provided... Unfortunately, in the case above, the mass effect was so severe that this man only survived for a couple of weeks after his initial presentation.

No MeSH data available.


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Cerebral Herniation, cerebral neoplasm

USU Teaching File MUTF - MedPix (2000)

© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=MPX2777&req=5

View Article: MedPix Image - MedPix Topic

Affiliation: Uniformed Services University

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

The two most common types of brain herniation are the subfalcine and descending transtentorial herniation, see Diagram of herniation types enclosed... Transtentorial herniation can be either descending or ascending... The central lobule, culmen, and superior surface of the cerebellum are displaced superiorly leading to effacement of the superior vermian cistern and compression and displacement of the fourth ventricle anteriorly... With increasing displacement superiorly, the quadrigeminal cistern becomes deformed and the midbrain becomes displaced anteriorly... Other types of herniations include: transalar (transsphenoidaI), tonsillar, and miscellaneous (ie. transdural/transcranial)... The descending type occurs when the frontal lobe is displaced posteriorly over the y eater sphenoid ala, causing the sylvian fissure, horizontal middle cereberal artery, and temporal lobe to be displaced backward In the ascending type, the temporal lobe, sylvian fissure, and middle cerebral artery are displaced over the sphenoid ridge... Tonsillar herniation is usually concurrent in 2/3's of the people with the ascending transalar herniation and 1/3 of those with descending transalar herniation... The cerebellar tonsils are inferiorly displaced through the foramen magnum which can lead to compression of the brain stem and death due to respiratory depression... To identify herniation, MRI is most useful since it yields multiplanar images... With these images, the mass effect on the adjacent structures can be identified and further therapy with surgery or radiation can be provided... Unfortunately, in the case above, the mass effect was so severe that this man only survived for a couple of weeks after his initial presentation.

No MeSH data available.