CTA showing segmental narrowing of intracranial vessels in a 33 year old woman with postpartum angiopathy (reversible cerebral vasoconstriction syndrome)

Head CT angiography (CTA) six days after onset of postpartum occipital headache reveals segmental narrowing of the left middle cerebral artery and the A1 segment of the right anterior cerebral artery (panel A, arrows); in addition, there is segmental narrowing of the posterior cerebral and left distal vertebral arteries with broad narrowing of the basilar artery (panel B, arrows). Head magnetic resonance angiography (MRA) two months after discharge shows complete reversal of arterial pathology (panels C and D). The magnification is similar in all parts of the figure; the white vertical band denotes 5 cm.