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

Abstract Background Perimesencephalic 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 a...

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Bibliographic Details
Published in:World neurosurgery 2017
Main Authors: Cho, Kwang-Chun, Kim, Jung-Jae, Hong, Chang-Ki, Joo, Jin-Yang, Kim, Yong Bae
Format: Article
Language:English
Subjects:
Neurosurgery
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Summary:Abstract Background Perimesencephalic 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 Description A 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 revealed; 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. Conclusion On 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 to keep in mind, that a SAH might be a PNSAH.
ISSN:1878-8750
DOI:10.1016/j.wneu.2017.03.134