Arnold Chiari I or II associated with Synringomyelia?

[Jonari]

FA12 errata says that it's associated with Chiari I malformation. Other sources are saying it's Chiari II malformation.

Seems like a while back, it was the opposite.

http://forums.studentdoctor.net/showthread.php?t=827599


Extremely frustrated because of this.

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[Ycut]

Type 2

 

[mmmcdowe]

Techinically both, which is why it keeps flopping.

 

[Phloston]

They both are associated with syringomyelia.

Only type-II has the myelomeningocoele, but they both have syringomyelia.

That's actually high-yield.

 

[fleshwound]

big Robbins page 1286 (most recent edition) only states that syringomyelia may be associated with chiari type 1. No mention of type 2 is mentioned in association with syringomyelia.

 

[Phloston]

Does it actually have written ONLY type-I, or does it only happen to mention it for type-I?

Because it's definitely seen in both.

The only thing you've gotta know is that the meningomyelocele is type-II.

 

[fleshwound]

Does it actually have written ONLY type-I, or does it only happen to mention it for type-I?

Because it's definitely seen in both.

The only thing you've gotta know is that the meningomyelocele is type-II.

the latter

 

[Phloston]

Cutting to the chase though, the way the USMLE will test this:

If it's type-II, they'll practically always tell/show you there's the myelomeningocoele, and the patient will likely be an infant.

With type-I, they'll likely give you a teenager / young adult with the typical bilateral loss of temperature/pain sensation in a cape-like distribution. That indicates the syringomyelia at the anterior white commissure.

 

[Jonari]

Type 2

Thanks for the response.

Techinically both, which is why it keeps flopping.

Thanks for the response.

They both are associated with syringomyelia.

Only type-II has the myelomeningocoele, but they both have syringomyelia.

That's actually high-yield.

Thanks for the response. Appreciate it! It's quite frustrating when sources are conflicting between a detail at that level.

 

[thecalccobra]

They both are associated with syringomyelia.

Only type-II has the myelomeningocoele, but they both have syringomyelia.

That's actually high-yield.

I was confused about this as well. Thanks for the clarification.