Citations 1
Dural arteriovenous fistulas are not observed to convert to a higher grade after partial embolization
Walker, Erin , Srienc, Anja I. , Lew, Daphne , Guniganti, Ridhima , Brinjikji, Waleed , Hayakawa, M. , Samaniego, Edgar A. , Lai, Rosalind, Sheehan, Jason P. , Starke, Robert M., Abla, Adib A. , Gross, Bradley A. , Albuquerque, Felipe C , Lawton, Michael T. , Kim, Louis J. , Levitt, Michael R. , Alaraj, Ali , Winkler, Ethan A. , Polifka, Adam , Bulters, Diederik , Durnford, Andrew , Satomi, Junichiro, Tada, Yoshiteru , Dijk, J. Marc C. van , Potgieser, Adriaan R. E., Zipfel, Gregory J. , Levitt, Michael R , Alaraj, Ali , Samaniego, Edgar A , van DijK, J Marc C , Abla, Adib , Bulters, Diederik O , Lanzino, Giuseppe , Derdeyn, Colin P. , Du, Rose , Abdelsalam, Ahmed , Gross, Bradley , Kim, Louis J. , Amin-Hanjani, Sepideh , Fox, W Christopher , Hall, Samuel , Chen, Ching‐Jen , Becerril‐Gaitan, Andrea , Osbun, Joshua W
Neurosurgical Focus | March 1, 2024 | Volume: 56 | Issue: 3 | Pages: E8
OBJECTIVE Borden-Shucart type I dural arteriovenous fistulas (dAVFs) lack cortical venous drainage and occasionally necessitate intervention depending on patient symptoms. Conversion is the rare transformation of a low-grade dAVF to a higher grade. Factors associated with increased risk of dAVF conversion to a higher grade are poorly understood. The authors hypothesized that partial treatment of type I dAVFs is an independent risk factor for conversion. METHODS The multicenter Consortium for Dural Arteriovenous Fistula Outcomes Research database was used to perform a retrospective analysis of all patients with type I dAVFs. RESULTS Three hundred fifty-eight (33.2%) of 1077 patients had type I dAVFs. Of those 358 patients, 206 received endovascular treatment and 131 were not treated. Two (2.2%) of 91 patients receiving partial endovascular treatment for a low-grade dAVF experienced conversion to a higher grade, 2 (1.5%) of 131 who were not treated experienced conversion, and none (0%) of 115 patients who received complete endovascular treatment experienced dAVF conversion. The majority of converted dAVFs localized to the transverse-sigmoid sinus and all received embolization as part of their treatment. CONCLUSIONS Partial treatment of type I dAVFs does not appear to be significantly associated with conversion to a higher grade.