… , those usually appropriate for initial imaging of suspected vascular malformation are MR
angiography … The American College of Radiology Appropriateness Criteria are evidence-based …

… of SAH and appropriate imaging, please see the ACR Appropriateness Criteria® topic on “…
For potential SAH in the setting of head trauma, please see the ACR Appropriateness Criteria…

… Catheter angiography is rarely required for the evaluation of incidentally discovered DVA
but may be used to exclude the possibility of an associated high-flow vascular malformation. …

… The American College of Radiology Appropriateness Criteria are evidence-based guidelines
for specific clinical conditions that are reviewed annually by a multidisciplinary expert panel…

… for underlying enhancing mass or vascular malformation. ○ … concern for venous thrombosis
or vascular malformation. ○ … is concern for venous thrombosis or vascular malformation. ○ …

… Additionally, in suspected vascular malformation, MRI provides detail of trans-spatial extent
and adjacent neurovascular structures 97, 98. The addition of contrast is usually helpful for …

… 1Flow chart depicting an evidence based algorithm for the workup of a suspected vascular
malformation. a Low-flow malformations may show arterial or venous flow in vascularized …

… Please refer to the ACR Appropriateness Criteria ® “Cerebrovascular Disease” [3] for
imaging in this context. If a cerebral aneurysm or vascular malformation is identified on …

… vascular malformation vs slow-flow vascular malformation (Figure 2). The incidence of venous
malformations as the most common slow-flow malformation is 1-2:5000, with an impact on …

… CT angiography (CTA) of the head and neck may be helpful in children with ataxia due to
a posterior circulation stroke, hemorrhage, or vascular malformation. However, this …