Double origin of the posterior inferior cerebellar artery dissection causing subarachnoid hemorrhage with pathological confirmation: illustrative case

To the authors' knowledge, this is the first report of a case in which cerebral vascular dissection was pathologically confirmed as the source of hemorrhage in an SAH associated with DOPICA. This case suggests that surrounding anatomical supporting structures may be involved in the etiology of dissection. In cases of SAH associated with DOPICA with uncertain vascular anatomy or bleeding source, surgical trapping via direct visualization should be considered as a treatment option. https://thejns.org/doi/10.3171/CASE25919.