• Taiki Isaji, Tomotaka Ohshima, Shigeru Miyachi, Naoki Matsuo, Reo Kawaguchi, and Masakazu Takayasu.
• Department of Neurosurgery, Aichi Medical University, Nagakute, Aichi, Japan.
• World Neurosurg. 2018 Aug 1; 116: 44-49.

BackgroundSegmental arterial mediolysis is a rare disease characterized by idiopathic noninflammatory vasculopathy involving small to medium arteries. Here, we report a case of ruptured cerebral and abdominal aneurysms, which were successfully treated using emergency endovascular coil embolization.Case DescriptionA 45-year-old male suffered subarachnoid hemorrhage caused by the rupture of the right vertebral artery dissecting aneurysm, which was treated using emergency endovascular coiling. Iatrogenic dissection of the left vertebral artery occurred during the procedure. A stent was placed, and antivasospasm therapy was initiated after operation. Eight days after admission, the patient experienced sudden hypovolemic shock because of an abdominal hemorrhage, which was diagnosed as the rupture of an aneurysm in the accessory middle colic artery and treated with urgent coil embolization.ConclusionsIt is extremely rare for a subarachnoid and an abdominal hemorrhage to occur simultaneously during hospitalization. Here, owing to the vulnerability of the unaffected vertebral artery during the initial procedure, segmental arterial mediolysis was diagnosed.Copyright © 2018 Elsevier Inc. All rights reserved.

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