• Bianca Baldassarre, Alberto Balestrino, Alessandro D'Andrea, Pasquale Anania, Marco Ceraudo, Monica Truffelli, Ilaria Melloni, Nicola Mavilio, Lucio Castellan, Gianluigi Zona, and Pietro Fiaschi.
• Department of Neuroscience "Rita Levi Montalcini", Neurosurgery Unit, University of Turin, Turin, Italy.
• Eur Spine J. 2021 Oct 1; 30 (10): 2767-2774.

PurposeSpinal aneurysms are rare vascular malformations, commonly associated with spinal AVMs. AVM-associated spinal aneurysms are burdened by significant morbidity. The purpose of our study is to evaluate the best treatment strategy for these uncommon vascular lesions and to report an illustrative case.MethodsWe reviewed clinical and radiological data of a patient surgically treated at our institution for a spinal AVM with an associated prenidal aneurysm. According to PRISMA guidelines, a systematic literature review has been performed in order to discuss the best management AVM-associated prenidal aneurysms.ResultsIn the reported case, the aneurysm showed spontaneous regression at follow-up after surgical removal of the AVM. Only 6 articles reported management of spinal prenidal AVM-associated aneurysms. Basing on our experience and data from literature, surgical treatment of the aneurysm may be indicated along with the resection of the AVM if the aneurysm is close to the nidus. Conversely, if the aneurysm is far away from the nidus or in an unfavorable position, resection of the nidus only may lead to aneurysm regression as in the reported case.ConclusionsThe treatment strategy for AVM-associated spinal aneurysms should be tailored on the single patient. In presence of large aneurysms that cause mass-effect symptoms, when rupture of the aneurysm is suspected or when treatment of the AVM is not proposable, direct treatment of the aneurysm should be considered. Otherwise, when complete resection of the nidus is performed, the eventually associated unruptured aneurysms located in challenging positions can be safely managed conservatively.© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

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