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Difference between revisions of "Chiari malformation"
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'''Chiari malformation''' is a developmental abnormality of the brain. | '''Chiari malformation''' is a developmental abnormality of the brain. | ||
==Classification== | ==General== | ||
*Usually a radiologic diagnosis. | |||
*May be seen in a [[fetal autopsy]]. | |||
===Classification=== | |||
Numbered from least severe to most severe: | Numbered from least severe to most severe: | ||
*Chiari type I - tonsils herniated<ref>URL: [http://rarediseases.info.nih.gov/GARD/Disease.aspx?diseaseID=9230 http://rarediseases.info.nih.gov/GARD/Disease.aspx?diseaseID=9230]. Accessed on: 6 May 2011.</ref> (radiologic definition: 4-6 mm below the plane of the foramen magnum). | *Chiari type I - tonsils herniated<ref>URL: [http://rarediseases.info.nih.gov/GARD/Disease.aspx?diseaseID=9230 http://rarediseases.info.nih.gov/GARD/Disease.aspx?diseaseID=9230]. Accessed on: 6 May 2011.</ref> (radiologic definition: 4-6 mm below the plane of the foramen magnum). | ||
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*Chiari type III - cerebellum + brain stem herniate through foramen magnum +/- encephalocele.<ref>URL: [http://www.ninds.nih.gov/disorders/chiari/detail_chiari.htm http://www.ninds.nih.gov/disorders/chiari/detail_chiari.htm]. Accessed on: 6 May 2011.</ref> | *Chiari type III - cerebellum + brain stem herniate through foramen magnum +/- encephalocele.<ref>URL: [http://www.ninds.nih.gov/disorders/chiari/detail_chiari.htm http://www.ninds.nih.gov/disorders/chiari/detail_chiari.htm]. Accessed on: 6 May 2011.</ref> | ||
*Chiari type IV - cerebellar hypoplasia or no cerebellum. | *Chiari type IV - cerebellar hypoplasia or no cerebellum. | ||
==See also== | |||
*[[Fetal autopsy]]. | |||
*[[Neuropathology]]. | |||
==References== | ==References== | ||