Complete Basilar Artery Occlusion Following Ventriculoperitoneal Shunt Placement for Giant Aneurysm Complicated by Concurrent Obstructive Hydrocephalus: A Case Report

Objective: Giant aneurysms are infrequently complicated with obstructive hydrocephalus (HC), however, when concurrent, effective treatments are unestablished. There are incredibly few reports of HC due to basilar artery giant aneurysms and fewer reports regarding ventriculoperitoneal (VP) shunt complications in these patients. Case presentation: We report the case of a gentleman in his 70 s who presented with a fusiform aneurysm of the entire basilar artery and mild intra-aneurysmal thrombosis. HC, secondary to the aneurysm, indicated VP shunt placement. Within 12 h following shunt placement, however, the patient deteriorated rapidly due to complete basilar artery occlusion and widespread brainstem ischemia. Endovascular intervention was unsuccessful due to extremely high clot burden. He unfortunately expired 2 days afterwards.Conclusion: Hydrocephalus due to aneurysms is not uncommon, and VP shunt placement should be optimized to avoid unforeseen complications like the one described. We suspect that the shunt placement aggravated the already aberrant flow within the aneurysm, propagating a pro-thrombotic environment. With further reports of this complication, a standardized method to place VP shunts for patients with giant aneurysms while minimizing the risk of thrombotic occlusion could be established.(c) 2022 International Hemorrhagic Stroke Association. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creati-vecommons.org/licenses/by-nc-nd/4.0/).