2020 Volume 5 Issue 1 Pages 65-71
Regarding dural arteriovenous fistula after cerebral venous sinus thrombosis (DAVF after CVST), not only its clinical characteristics but the mechanism of its onset and progress have remained unelucidated yet. This report attempted to clarify them as possible as we can.
We analyzed previously reported cases and our cases of DAVF after CVST, focusing on (1) frequency, (2) required condition of the previous CVST, (3) difference based on sex, (4) clinical characteristics and mechanism of its onset and progress.
We summarized the following four points: 1. DAVF after CVST occurred in cases of CVST with residual thrombus after treatment. 2. Its clinical features were multiple complicated DAVF, or non-sinus type of convexity DAVF. 3. In its early stage, DAVF occurred around the residual CVST and draining inside of the thrombus to the patent part of sinus. In next stage, the secondary DAVF appeared based on the venous hypertension. 4. More than 3 years' MRI follow-up is required in cases of CVST with residual thrombosis in the sinus.
