“…11 It has been postulated that vasoconstriction of small arterioles early in the course of RCVS, along with hypertension and breakdown of autoregulatory mechanisms, may precipitate the rupture of small pial vessels with resulting subarachnoid hemorrhage. 17,59,62 Other patterns of intracranial hemorrhage encountered in RCVS include intraparenchymal hemorrhage and subdural hematomas. 1,8,57,59,63 Intraparenchymal hemorrhage can be see in up to 6%-20% of patients and most often is unifocal and lobar in location.…”