A Case of Turner Syndrome Presenting as Aneurysmal Subarachnoid Hemorrhage

We report a rare case of cerebral aneurysmal subarachnoid hemorrhage (SAH) associated with Turner syndrome. A 34-year-old woman presented with aneurysmal SAH originating from a saccular aneurysm in the right anterior communicating artery. The patient underwent endovascular coil embolization of the aneurysm. The patient recovered favorably after surgery without any neurological deficits. She had previously been diagnosed with Turner syndrome, which was managed with medical treatment, including estrogen hormone replacement therapy. It is uncommon for a patient with Turner syndrome to present with aneurysmal SAH; nonetheless, aneurysmal SAH could be a clinical concern. Further investigations are needed to reveal the risk factors, vascular anatomy, and causative mechanisms of aneurysmal SAH in patients with Turner syndrome. Key words: Intracranial aneurysm; Subarachnoid hemorrhage; Turner syndrome; Estrogens