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We would like to thank Dr. Srinivasan and Dr. Kan for their remarks [1] on our paper [2]. We think that these publications were developed simultaneously. In addition, we think that more series would be reported in the future regarding the failure of the pipeline in the treatment of posterior communicating artery aneurysms associated with a fetal posterior cerebral artery. We also congratulate Srinivasan et al. [3] and Kan et al. [4] on their work on this topic and we agree that the most likely explanation of the pipeline failure is the high flow demand in this type of circulation. This can also explain why parent artery occlusion can lead to cerebellar infarction in this subset of patients [5]. We are also working on reporting other aneurysm geometrical factors that contribute to failure of flow-diversion; however this work is still in its early stages.

case reports in vascular medicine

Response to: Comment on “Failure of the Pipeline Embolization Device in Posterior Communicating Artery Aneurysms Associated with a Fetal Posterior Cerebral Artery”