AI Article Synopsis
- The study aimed to compare CT and MR imaging findings of dural arteriovenous fistulas (DAVFs) with their venous drainage patterns as seen in digital subtraction angiography (DSA).
- A total of 92 patients' imaging results showed that certain features, like dilated and tortuous vessels, were significantly more common in those with cortical venous reflux (CVR) as indicated by DSA.
- The authors concluded that recognizing specific imaging signs related to venous congestion and arterial feeder enlargement could indicate the need for further confirmation via DSA to identify DAVFs associated with CVR.
Article Abstract
Purpose: To compare the conventional CT and MR findings of DAVFs in relation to the venous drainage pattern on digital subtraction angiography (DSA).
Materials And Methods: Cross-sectional imaging findings (CT and/or MR) in 92 patients were compared to the presence of cortical venous reflux (CVR) on DSA.
Results: Imaging features significantly more prevalent in patients with CVR included: abnormally dilated and tortuous leptomeningeal vessels (92% vs. 4%, p<0.001) or medullary vessels (69% vs. 0%, p<0.001), venous ectasias (45% vs. 0%, p<0.001) and focal vasogenic edema (38% vs. 0%, p<0.001). The following findings trended towards association but did not reach the p value established following Bonferroni correction: dilated external carotid artery branches (71% vs. 38%, p=0.005), cluster of vessels surrounding dural venous sinus (50% vs. 19%, p=0.009), presence of hemorrhage (33 vs. 12%, p=0.040), and parenchymal enhancement (21% vs. 0%, p=0.030).
Conclusion: In the appropriate clinical setting, recognition of ancillary signs presumably related to venous arterialization and congestion as well as arterial feeder hypertrophy should prompt DSA confirmation to identify DAVFs associated with CVR.
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| http://dx.doi.org/10.1016/j.ejrad.2015.04.019 | DOI Listing |
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