Arnold-Chiari malformation classification: Difference between revisions

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Revision as of 14:10, 8 August 2019

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

Arnold chiari malformation may be classified according to herniation content into 4 subtypes:^[1]

Subtypes	Explanation	Association
Type1	Herniation parts: Crebellar tonsil, flocculi, caudal medulla	Syringomyelia
Type 2	Herniation parts: Crebellar tonsil, flocculi, caudal medulla, caudal portion of 4th ventricle	Lumbosacral myelomeningocele
Type 3	Herniation parts: Crebellar tonsil, flocculi, caudal medulla, caudal portion of 4th ventricle, lower brain stem	Occipital encephalocele
Type 4	Herniation parts: Brain stem located in posterior fossa, underdeveloped cerebellum	A variation of cerebellar hypoplasia

Syringomiyelia associated with Chiari malformation

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 ! style="background: #4479BA; color: #FFFFFF; text-align: center;" |Subtypes
 ! style="background: #4479BA; color: #FFFFFF; text-align: center;" |Explanation
-!Association
+! style="background: #4479BA; color: #FFFFFF; text-align: center;" |Association
 |-
 ! style="background: #DCDCDC; text-align: center;" |Type1
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-|Syringomyelia
+| style="background: #F5F5F5;" |Syringomyelia
 |-
 ! style="background: #DCDCDC; text-align: center;" |Type 2
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 *
-|Lumbosacral myelomeningocele
+| style="background: #F5F5F5;" |Lumbosacral myelomeningocele
 |-
 ! style="background: #DCDCDC; text-align: center;" |Type 3
@@ Line 26: / Line 26: @@
 *
-|Occipital encephalocele
+| style="background: #F5F5F5;" |Occipital encephalocele
 |-
 ! style="background: #DCDCDC; text-align: center;" |Type 4
@@ Line 32: / Line 32: @@
 *
-|A variation of cerebellar hypoplasia
+| style="background: #F5F5F5;" |A variation of cerebellar hypoplasia
 |}