• World Neurosurg · Jun 2017

    Case Reports

    Perimesencephalic Nonaneurysmal Subarachnoid Hemorrhage after Clipping of an Unruptured Aneurysm: Case Report.

    • Kwang-Chun Cho, Jung-Jae Kim, Chang-Ki Hong, Jin-Yang Joo, and Yong Bae Kim.
    • Department of Neurosurgery, College of Medicine, Yonsei University, Gangnam Severance Hospital, Seoul, Korea.
    • World Neurosurg. 2017 Jun 1; 102: 694.e15-694.e19.

    BackgroundPerimesencephalic nonaneurysmal subarachnoid hemorrhage (PNSAH) is a benign form of subarachnoid hemorrhage with an excellent clinical outcome. The cause of PNSAH remains unknown. We report a case of PNSAH in a patient with a history of clipping of an unruptured aneurysm. PNSAH after clipping of an unruptured aneurysm is extremely rare.Case DescriptionA 56-year-old man with a history of clipping surgery for an unruptured aneurysm 10 months previously presented with severe headache. No precipitating causes were shown; however, the patient had been engaged in an exertional activity before the event. After conservative treatment, he was discharged home without any complication from the hemorrhage.ConclusionsOn the basis of this case report, clinicians should consider the possibility of PNSAH in a patient who had an unruptured aneurysm previously treated with clipping. Nevertheless, diagnostic workup can be more important than keeping in mind that a subarachnoid hemorrhage might be a PNSAH.Copyright © 2017 Elsevier Inc. All rights reserved.

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