A headache-free reversible cerebral vasoconstriction syndrome (RCVS) with symptomatic brain stem ischemia at late pregnancy as a rare manifestation of RCVS resolved with termination of pregnancy by semi-urgent cesarean section.

A 32-year-old pregnant woman in her 39th week of pregnancy presented at the emergency room complaining of sudden-onset dizziness with gaze disturbance and was admitted to our hospital. Her past medical history included hypertension, diabetes mellitus and infarction in the right medulla oblongata 18 months prior to this event. Magnetic resonance (MR) angiography showed multiple irregular stenosis of the intracranial arterial system. Although MR images revealed no fresh ischemic or hemorrhagic lesions, she was diagnosed with reversible cerebral vasoconstriction syndrome (RVCS) associated with pregnancy. Cesarean section immediately resolved the headache-free ischemic RCVS. The postpartum course of the patient was uneventful as well as that of her baby. Follow-up MR angiography showed improvement of intracranial vasoconstriction and follow-up MR imaging showed improvement of a left medial pontine ischemic lesion on diffusion-weighted image. This report describes a rare manifestation of pregnancy-related RCVS.