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Chiari Malformations 02

Topic: Pediatric

Created on Friday, May 30 2008 by jdmiles

Last modified on Friday, May 30 2008.


Which one answer below most correctly describes what is seen in the image above?

 
        A) Arnold-Palmer malformation
 
        B) Chiari type III malformation
 
        C) Dandy-Walker malformation
 
        D) Chiari type I malformtation
 
        E) Arachnoid cyst
 

 


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This question was created on May 30, 2008 by jdmiles.
This question was last modified on May 30, 2008.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Arnold-Palmer malformation

This answer is incorrect.


This MRI shows a Chiari type I malformation. Arnold-Chiari is a name originally applied to the Chiari type II malformation. Arnold Palmer is a pro golfer. Alternatively, Arnold Palmer may refer to a tasty beverage consisting of a mixture of lemonade and iced tea.  (See References)

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B) Chiari type III malformation

This answer is incorrect.


This MRI shows a Chiari type I malformation, with protrusion of the cerebellar tonsils through the foramen magnum. In a Chiari type II, the medulla and 4th ventricle would also be downwardly displaced. A Chiari type III malformation would include an occipital encephalocele, which is not seen in this image.  (See References)

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C) Dandy-Walker malformation

This answer is incorrect.


This MRI shows a Chiari malformation. The Dandy-Walker malformation does not involve low-set cerebellar tonsils, but rather involves lack of a cerebellar vermis.   (See References)

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D) Chiari type I malformtation

This answer is correct.


This MRI shows a Chiari type I malformation.  (See References)

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E) Arachnoid cyst

This answer is incorrect.


This MRI shows a Chiari malformation, not an arachnoid cyst.   (See References)

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References:

1. Sklar, E.M.L., Ruiz, A., Quencer, R.M., and Falcone, S.F. (2004). Structural neuroimaging. In Bradley, W.G., Daroff, R.B., Fenichel, G.M., and Jankovic, J. (Eds.). Neurology in Clinical Practice, Fourth Edition. Butterworth Heinemann, Philadelphia, pp. 521-597 (ISBN:0750674695). Advertising:
2. Sarnat, H.B., and Flores-Sarnat, L. (2004). Developmental disorders of the nervous system. In Bradley, W.G., Daroff, R.B., Fenichel, G.M., and Jankovic, J. (Eds.). Neurology in Clinical Practice, Fourth Edition. Butterworth Heinemann, Philadelphia, pp. 1763-1789 (ISBN:0750674695). Advertising:
3. Rosenbaum, R.B., and Ciaverella, D.P. (2004). Disorders of bones, joints, ligaments, and meninges. In Bradley, W.G., Daroff, R.B., Fenichel, G.M., and Jankovic, J. (Eds.). Neurology in Clinical Practice, Fourth Edition. Butterworth Heinemann, Philadelphia, pp. 2189-2222 (ISBN:0750674695). Advertising:
4. Robert I. Grossman, David M. Yousem. Neuroradiology: the requisites. Philadelphia, Pa. : Mosby, c2003. (ISBN:032300508X) Advertising:
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pediatric
Chiari Malformations 02
Question ID: 052908177
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 05/30/2008
Modified: 05/30/2008
Estimated Permutations: 1200

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