Turkish Neurosurgery 2022 , Vol 32 , Num 1
Ruptured Proximal Anterior Cerebral Artery Aneurysm Treated with Flow Diverter
Andrea GIORGIANNI1,Gabriele VINACCI2,Edoardo AGOSTI3,Stefano MOLINARO1,Alberto Vito TERRANA1,Federica CASAGRANDE4,Francesco Alberto VIZZARI1,Fabio BARUZZI1,Davide LOCATELLI3
1ASST Settelaghi, Ospedale di Circolo e Fondazione Macchi, Department of Neuroradiology, Varese, Italy
2University of Insubria, Ospedale di Circolo e Fondazione Macchi, Department of Radiology, Varese, Italy
3University of Insubria, Ospedale di Circolo e Fondazione Macchi, Department of Biotechnology and Life Sciences, Division of Neurosurgery, Varese, Italy
4ASST Settelaghi, Ospedale di Circolo e Fondazione Macchi, Department of Neurosurgery, Varese, Italy
DOI : 10.5137/1019-5149.JTN.33423-20.3 AIM: To discuss the use of flow modulation in treating ruptured aneurysms of the proximal segment of the anterior cerebral artery (A1 aneurysms). A1 aneurysms are rare, constituting approximately 1% of all intracranial aneurysms.

CASE REPORT: We report a left A1 aneurysm with a wide neck and small sac (3 × 1.8 mm). In order to treat the lesion, a flow diverter (4 × 12?18 mm, FRED, Microvention) was placed from M1 to the proximal end of the paraophthalmic internal carotid artery, without directly covering the neck of the aneurysm. No procedural bleeding occurred. During stent deployment, abciximab was infused. A day after the procedure, double antiplatelet therapy was initiated for 1 month, followed by single antiplatelet therapy for another 3 months.

Due to the aneurysm morphology, we opted for a competitive flow diversion, covering the parent artery origin and leaving the A1A neck uncovered. A decreased flow into the aneurysmal parent artery gradually promoted aneurysm sac thrombosis. Both digital subtraction angiography at a 12-month follow-up and computed tomography angiography 24-month follow-up confirmed the regular patency of the stent and resolution of the aneurysm. In addition, the competitive modulation of flow in the ipsilateral anterior cerebral artery results in the narrowing of the vessel.

CONCLUSION: A1 aneurysm endovascular treatment is often challenging. Coiling or assisted coiling is the most frequently employed. Although flow diverter stent (FDS) is a consolidated technique for treating ruptured intracranial blister-like and dissecting aneurysms, its role in treating intracranial saccular ruptured aneurysms has to be elucidated. However, more number of case studies is needed to confirm the efficacy and safety of an FDS in treating ruptured A1 aneurysms. Keywords : Endovascular, Flow diverter, A1 Aneurysm, Ruptured aneurysm

Corresponding author : Gabriele VINACCI, gabriele_vinacci@libero.it