CHIARI MALFORMATIONS RADIOLOGY CT MRI

Group of congenital defects ass varying degree caudal displacement of post fossa contents into cervical canal.
Caudal tonsillar herniation (≥ 5 mm below BO line)
Pointed, peg-like tonsils with angled folia
“Crowded” foramen magnum on axial
Small, shallow posterior fossa
Inferiorly herniation medulla, vermis and choroid plx of 4th v into cervical canal
Cervicomedullary spur”
upward displacement of cerebellum and vermis --“Towering” and “creeping” cerebellum
compression of quadrigeminal plate by superiorly displaced cerebellum --Tectal beaking
“fourth ventricle--- elongated and thin “Soda straw”
Hydrocephalus (90%)
Lacunar skull

[@saroderavi8937]

The clarity with which you explain the topic is commendable. Thank you.

[@radiology9002]

Glad it was helpful!

[@nesrinech3967]

thank you so much for the cristal clear explanation , it helped me a lot !

[@maryamrabbani7924]

Nicely explained

[@Bellaisyourgirl]

Thank u for sharing 🙏🙏

[@Gray_lyf]

Thank you very much sir

[@DrGDDevan]

Excellent sharing sir

[@azharsyed1867]

Thank you

[@drmkmittal9636]

nice simplified explaination of ACM

[@radiology9002]

thanks

[@achalesh100]

😊thanks

[@hamidabdul7231]

Thank you so much

[@radiology9002]

Welcome

[@keannabell4424]

what do right cerebellar tonsillar tips extend 3 mm beyond the foramen magnum with preserved rounding of the tip and no significant crowding at the foramen magnum. faint thin linear t2 flair hyperintense focus in the right corona radiata and centrum semiovale mean on mri

[@rafaomer9624]

Amazing

[@radiology9002]

Thanks

[@tahirakhanradiology807]

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[@radiology9002]

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[@nazirahmaddar6111]

Mutlab classic

[@radiology9002]

??

[@sadeniastefanchik7771]

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[@radiology9002]

but why

[@ahmedsamirghonim9156]

Thank you

[@radiology9002]

Welcome