Sinovenous outflow in lateral sinus dural arteriovenous fistulas after stereotactic radiosurgery: a retrospective longitudinal imaging study

Yong Sin Hu, Cheng Chia Lee, Chia An Wu, Hsiu Mei Wu, Huai Che Yang, Wan Yuo Guo, Chao Bao Luo, Kang Du Liu, Wen Yuh Chung, Chung Jung Lin

Research output: Contribution to journalArticlepeer-review

Abstract

Purpose: To investigate sinovenous outflow restriction (SOR) in lateral sinus dural arteriovenous fistulas (LSDAVFs) after Gamma Knife radiosurgery (GKRS) and its association with complete obliteration. Methods: We retrospectively (1995–2019) enrolled 39 patients with LSDAVFs who had undergone GKRS alone and evaluated their angiography and magnetic resonance imaging (MRI) before and after GKRS. The LS conduits ipsilateral and contralateral to the DAVFs were scored using a 5-point scoring system, with scores ranging from 0 (total occlusion) to 4 (fully patent). SOR was defined by a conduit score < 2. Demographics, imaging features, and outcomes were compared between patients with and without ipsilateral SOR after GKRS. Logistic regression analysis was performed to estimate the odds ratio (OR) for obliteration with the imaging findings. Results: After a median angiographic follow-up of 28 months for the 39 patients, the ipsilateral LS became more restrictive (median conduit score before and after GKRS: 2 vs. 1, p =.011). Twenty-one patients with ipsilateral SOR after GKRS had a significantly lower obliteration rate (52.4% vs. 94.4%, p =.005) than those without SOR. Follow-up SOR was independently associated with a lower obliteration rate (OR 0.05, p =.017) after adjustment for age, cortical venous reflux, and absent sinus flow void on MRI. Conclusion: This study demonstrates a restrictive change of outflow in LSDAVFs after GKRS and a lower obliteration rate in patients with SOR. Follow-up imaging for SOR may help predict outcomes of these patients.

Original languageEnglish
Pages (from-to)2409-2418
Number of pages10
JournalActa Neurochirurgica
Volume164
Issue number9
DOIs
Publication statusPublished - Sept 2022

Keywords

  • Angioarchitecture
  • Digital subtraction angiography
  • Dural arteriovenous fistula
  • Lateral sinus
  • Stereotactic radiosurgery
  • Vascular disorders

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

Fingerprint

Dive into the research topics of 'Sinovenous outflow in lateral sinus dural arteriovenous fistulas after stereotactic radiosurgery: a retrospective longitudinal imaging study'. Together they form a unique fingerprint.

Cite this