Subarachnoid hemorrhage secondary to ruptured posterior inferior cerebellar artery aneurysm in a patient with type 3 osteogenesis imperfecta: A case report and topic review.

Background: Osteogenesis imperfecta (OI) is a rare genetic disorder characterized by collagen Type I deficiency, leading to bone fragility, skeletal deformities, and, less commonly, vascular abnormalities. Cerebrovascular complications in OI are rare. There are few reports of subarachnoid hemorrhage (SAH) secondary to ruptured aneurysms in OI patients, particularly involving the posterior circulation.

Case description: We present a unique scenario of a long-term survivor, a female patient, with Type III OI who experienced a spontaneous SAH due to a ruptured posterior inferior cerebellar artery aneurysm.

Conclusion: Given the patient's underlying OI, special neurosurgical and endovascular techniques were employed to ensure safe aneurysm coiling and cerebrospinal fluid diversion. We outline these challenges faced in the management of such a patient and provide a literature review to contextualize our findings.