Abstract
Background: The changes of posterior cerebral arteries (PCAs) in Moyamoya disease (MMD) are often involved in the clinical setting. However, the changes of PCAs after recovering the hemodynamics of anterior circulation in MMD are not reported. Case Description: A 14-year-old patient was diagnosed as MMD with symptomatic stenosis in the right middle cerebral artery (MCA), asymptomatic stenosis in the left terminal internal carotid artery, and moyamoya-like vessels, stenotic lesion and an aneurysm were found in the right PCA, who was treated with balloon angioplasty in the right MCA. One month later, the patient suffered from transient ischemic attack in the right. DSA showed deteriorated severe stenosis in the left terminal portion of ICA and the proximal segment of MCA. The patient was performed angioplasty in the left ICA and MCA again. The follow-up angiography did not show any evidence of restenosis at the previous sites of stenosis after 18 months. Interestingly, the aneurysm and collateral vessels were disappeared as well as the stenotic vessel in the right PCA was recovered completely. Conclusion: Our findings indicated that the pathologic changes of PCA are reversible after recovering the hemodynamic of the anterior circulation in MMD. It is important to understand the pathophysiological changes of posterior circulation in MMD.
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