The case demonstrates multiple typical features of PRES in the form of cerebral predominantly occipital and frontoparietal vasogenic edema associated with multiple parenchymal microhemorrahgic foci within the areas of vasogenic edema as well as intraventricular hemorrhage.

Also, the MRA features were typical for PRES induced vasculopathy evident by vessel irregularities of the ACA, MCA & PCA arteries secondary to multifocal segments of vasospasm giving the "string-of-beads" appearance.

Posterior reversible encephalopathy syndrome (PRES) is a neurotoxic state that occurs secondary to the inability of the posterior circulation to autoregulate in response to acute changes in blood pressure.

PRES may be caused by several factors like in this patient, importantly severe hypertension as manifested by unstable vital signs or may be secondary to sepsis or drug-induced during her ICU admission.