“…44 Furthermore, PRES and RCVS often arise concurrently as complications of various medical conditions, including intravenous immunoglobin therapy, Guillain-Barre syndrome, immunosuppression, stem cell transplantation, blood transfusions, and septic shock. 2,7,28,54,56,66,67 Finally, both PRES and RCVS demonstrate similar clinical features, including an acute, self-limited course and symptomatology, such as headache, confusion, seizure, and transient or permanent neurologic deficits. 1,2,54 Given the significant overlap between the 2 entities, it is possible that RCVS and PRES may represent a spectrum of potential clinical manifestations of a common underlying pathophysiology involving various degrees of altered cerebral vascular tone and endothelial dysfunction.…”