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The authors report a rare example of an isolated dissecting posterior inferior cerebellar artery (PICA) aneurysm with spontaneous resolution. A 41 year-old male suffered sudden dizziness, nausea and vomiting. An angiogram and magnetic resonance imaging (MRI) detected an isolated PICA dissection. The patient was treated conservatively and recovered without any apparent neurological deficit. MRI detected the self-resolution of the dissecting aneurysm. Dissecting PICA aneurysms, especially non-haemorrhagic lesions, have the possibility of spontaneous resolution resulting in a favorable outcome. The treatment strategy for this vascular lesion may be decided based upon neuroradiological changes on careful follow-up.

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We report a 1-year-old girl who presented moyamoya disease associated with midaortic syndrome. She had been treated for cardiac failure and severe hypertension due to midaortic syndrome until she suffered seizure and repeated cerebral ischemic attack. Cerebral angiography revealed stenosis of the bilateral internal carotid artery at its terminal portion. She was successfully treated with encephaloduroarteriosynangiosis, and ischemic attack ceased postoperatively. This is the first report of moyamoya disease with midaortic syndrome. Although cerebral ischemic attack has been effectively managed by encephaloduroarteriosynangiosis, renovascular hypertension is still difficult to control.