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Sarpoolaki M K, Iranmehr A, Bitaraf M A, Naderi S, Namvar M. Non-aneurysmal Perimesencephalic Subarachnoid Hemorrhage in A COVID-19 Patient: Case Report and Review on Subarachnoid Hemorrhage Patterns in COVID-19. Iran J Neurosurg 2021; 7 (4) :213-218
URL: http://irjns.org/article-1-288-en.html

Background and Importance: The novel SARS-CoV-2 virus has had an undeniable effect worldwide in different aspects. Although cerebrovascular diseases, especially subarachnoid hemorrhage (SAH), have already been reported in COVID-19 patients, little is known about various types and patterns of SAH in these patients.
Case Presentation: A 63-year-old woman was admitted to the emergency department with a headache. Her headache was severe (Hunt and Hess score, grade 2). She was diagnosed with COVID-19 by a positive nasopharyngeal swab PCR test. Her CT scan revealed a perimesencephalic hemorrhage, thick SAH without any signs of hydrocephalus or intraventricular hemorrhage.
Conclusion: Regarding the different associations of SAH with COVID-19, the perimesencephalic hemorrhage in our case is a novel type. Although not uncommon among non-infected populations, SAH occurrence in COVID-19 patients has not been reported before and needs further investigation.