An arteriovenous malformation (AVM) of the spinal dura is uncommon but a potentially serious condition.

An arteriovenous malformation (AVM) of the dura surrounding the spinal cord is one of the 4 types of AVM in the spinal canal.



(1) hemorrhage

(2) congestive myelopathy, acute spinal cord syndrome

(3) myelopathy due to vascular steal

(4) spinal cord ischemic necrosis


Congestive myelopathy is associated with a "black butterfly" on T2*-weighted MRI imaging.


Differential diagnosis:

(1) intradural arteriovenous malformations (ventral sulcus, other)

(2) paraspinal arteriovenous malformation

(3) epidural arteriovenous malformation

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