Clinical outcomes of posterior fossa arteriovenous malformations: a single center experience
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Published:2024-05-14
Issue:1
Volume:166
Page:
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ISSN:0942-0940
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Container-title:Acta Neurochirurgica
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language:en
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Short-container-title:Acta Neurochir
Author:
Miron IoanaORCID, Prună Viorel M.ORCID, Visarion Dan, Giovani Andrei, Sandu Aurelia M., Brehar Felix M., Petrescu George E. D.ORCID, Gorgan Radu M.
Abstract
Abstract
Background
Posterior fossa arterio-venous malformations (pfAVMs) are challenging lesions due to the anatomical particularities of the posterior fossa, and the high incidence of hemorrhagic presentation. The two most important goals when treating AVMs are preserving neurological function and preventing rupture, or a second hemorrhage. The aim of this study was to analyze the clinical and imaging features of pfAVMs to identify the factors that influence the prognosis of these patients.
Methods
We conducted a single-center retrospective observational study that included patients treated at our institution with pfAVMs between January 1997 and December 2021.
Results
A total of 48 patients were included. A good modified Rankin score (mRS) was observed in 33 cases (69%) at presentation. Thirty-four patients (71%) presented with a ruptured AVM. Out of these, 19 patients (40%) had intraventricular hemorrhage. Microsurgical resection was performed in 33 cases (69%), while in the other cases, the patients opted for conservative management (7 cases, 15%), stereotactic radiosurgery (SRS) (6 cases, 12%), or endovascular treatment (2 cases, 4%). Patients ≤ 30 years old were more prone to hemorrhagic presentation (OR: 5.23; 95% CI: 1.42–17.19; p = 0.024) and this remained an independent risk factor for rupture after multivariate analysis as well (OR: 4.81; 95% CI: 1.07–21.53; p = 0.040). Following multivariate analysis, the only factor independently associated with poor prognosis in the surgically treated subgroup was a poor clinical status (mRS 3–5) at admission (OR: 96.14; 95% CI: 5.15–1793.9; p = 0.002).
Conclusions
Management of posterior fossa AVMs is challenging, and patients who present with ruptured AVMs often have a poor clinical status at admission leading to a poor prognosis. Therefore, proper and timely management of these patients is essential.
Publisher
Springer Science and Business Media LLC
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