The clinical course and outcomes of non-aneurysmal subarachnoid hemorrhages in a single-center retrospective study.

Background: Non-aneurysmal subarachnoid hemorrhages (SAHs) are thought to have a benign clinical course compared to aneurysmal SAHs. The aim of this study is to report the clinical course and outcomes of non-aneurysmal SAHs in a large single-center study.

Methods: The patients with non-aneurysmal SAHs were screened from Tampere University Hospital from 2005 to 2020.