We report a 34-year-old woman with sudden onset of unilateral migraine-like headache and right homonymous hemianopsia. Fast imaging employing steady-state acquisition (FIESTA) of the posterior cerebral artery captured an intimal flap and a pseudolumen, leading to a diagnosis of posterior cerebral artery dissection. This case was considered a spontaneous posterior cerebral artery dissection causing migraine-like headache. The treatment of migraine-like headache hinges on correct diagnosis. In this case, FIESTA was very useful in diagnosing an intracranial artery dissection.
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