Moyamoya disease is a rare cause of young strokes. The definitive diagnosis of moyamayo disease is made by cerebral angiography. We report two cases of moyamoya disease in Malaysia.
A case of an intracerebral bleed in a young man with a rare combination of arteriovenous malformation (AVM) and unilateral moyamoya disease is presented. The location of the bleed in the left basal ganglia corresponded to the area supplied by the basal moyamoya vessels. The AVM which received supply from collateral moyamoya vessels as well as normal cerebral arteries was located in the ipsilateral parieto-occipital region posterior to the basal ganglia bleed. This is the first reported cerebral AVM co-existing with a unilateral moyamoya disease in the English literature. Unusual features of the case such as the unilaterality of the angiographic abnormalities, their coexistence and hypotheses as to their development are discussed.
Saccular aneurysms associated with moyamoya disease are commonly located in the vertebrobasilar circulation. Anterior circulation aneurysm associated with moyamoya disease is uncommon and is usually treated by neurosurgical clipping. Objective: We report a succesful treatment using the endovascular approach in a case of ruptured anterior communicating artery aneurysm in unilateral moyamoya disease. Clinical Presentation: A 23 year old man presented with a 5 day history of headache, diplopia and fever. Computed Tomography (CT) scan and cerebral angiogram showed a bilobed anterior comunicating artery aneurysm. There was also severe M1 segment stenosis of the left middle cerebral artery with multiple collaterals, representing moyamoya vessels. Intervention: Treatment was done under general anesthesia and followed the standard practice for endovascular treatment. The aneurysm was occluded with three detachable platinum microcoils (Microplex®, Microvention®). Conclusion: Endovascular treatment can be a treatment option for ruptured anterior circulation saccular aneurysms associated with moyamoya disease.
Children with Down syndrome have a higher risk of stroke. Similarly, intravenous immunoglobulin (IV Ig) is also known to cause a stroke. We reported a 3-year-old boy with Down syndrome who presented with severe pneumonia and received IV Ig. He developed right hemiparesis 60 hours after the infusion. Blood investigations, echocardiography and carotid Doppler did not suggest vasculitis, thrombophilia or extracranial dissection. Brain computerised tomography (CT) showed acute left frontal and parietal infarcts. Initial magnetic resonance angiography (MRA) of cerebral vessels showed short segment attenuations of both proximal middle cerebral arteries and reduction in the calibre of bilateral supraclinoid internal carotid arteries. The boy was treated with enoxaparin and aspirin. He only had partial recovery of the hemiparesis on follow-up. A repeat MRA 13 months later showed parenchymal collateral vessels suggestive of moyamoya disease. We recommend imaging the cerebral vessels in children with a high risk of moyamoya before giving IV Ig.