Conditions that may be associated with RCVS:
(1) benign angiopathy of the CNS (BACNS)
(2) Call-Fleming syndrome
(3) postpartum angiopathy
(4) migrainous vasospasm
(5) drug-induced pseudoarteritis
(6) pheochromocytoma
Features of conditions with RCVS:
(1) usual onset consists of a thunderclap headache with or without associated neurologic deficits
(2) angiographic appearance of vasculitis
(3) reversal of angiographic changes after reversal of underlying cause, usually within 4-12 weeks
(4) relatively benign course
(5) CSF protein and leukocyte count normal or only mildly elevated
Exclusions:
(1) aneurysmal subarachnoid hemorrhage
(2) absence of secondary causes of vasculitis
(3) absence of primary angiitis of the CNS (PACNS)
