Reversible Cerebral Vasoconstriction Syndrome Misdiagnosed as Moyamoya Disease with Transient Ischemic Attack as Initial Manifestation

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Reversible cerebral vasoconstriction syndrome (RCVS) is a disease characterized by reversible and multiple stenoses of cerebral blood vessels that improve within 3 months, accompanied by thunderclap headache. Here, we report an interesting case of RCVS initially misdiagnosed as Moyamoya disease with transient ischemic attack. A 45-year-old woman visited the Neurology Department of Eulji University Hospital. The patient was initially diagnosed with Moyamoya disease with transient ischemic attack. However, follow-up magnetic resonance angiography performed 12 months after the patient was appropriately diagnosed as having RCVS. Key Words: Reversible cerebral vasoconstriction syndrome, Moyamoya disease, Transient ischemic attack