Moyamoya disease is a condition that results from bilateral stenosis or obstruction of the intracranial arteries at the base of the brain. Patients exhibit ischemic symptoms, and vascular reconstruction is the therapy of choice. Surgical treatment for Moyamoya disease is often complicated by cerebral ischemia, so the goal in perioperative management is to maintain the balance between oxygen sup...

Moyamoya disease is a cerebrovasculopathy of unknown etiology during the course of which the main and terminal veins of the internal carotid artery undergo progressive vein occlusion. Leigh syndrome is a mitochondrial encephalomyopathy that occurs due to "cytochrome c oxidase deficiency" characterized by psychomotor retardation, difficulty in eating, seizures, hypotonia, respiratory disorders a...

Moyamoya phenomenon is a term used to describe extensive collateralization of the circle of Willis arteries associated with severe unilateral or bilateral internal carotid artery stenosis or occlusion in the presence of certain conditions. Down syndrome is among these conditions. A case is reported of a young girl with Down syndrome who presented with fluctuating right-sided weakness and facial...

Moyamoya disease is a chronic, occlusive cerebrovascular disease with unknown etiology characterized by steno-occlusive changes at the terminal portion of the internal carotid artery, either bilaterally or unilaterally, and an abnormal vascular network at the base of the brain. Surgical revascularization such as extracranial-intracranial (EC-IC) bypass is the preferred procedure for moyamoya di...

Moyamoya disease is an idiopathic vascular disorder of the intracranial arteries. Ring finger 213 (RNF213) was previously identified as the strongest susceptibility gene for moyamoya disease in East Asian people by a genome-wide linkage analysis and exome analysis. The coding variant p.R4810K in RNF213 was strongly associated with moyamoya disease in the Japanese (odds ratio: 338.94, p = 1.05 ×...

PATIENT Male, 42 FINAL DIAGNOSIS: Moyamoya disease (MMD) Symptoms: Aphasia • concentration difficulty • dysarthria • personality change MEDICATION - Clinical Procedure: - Specialty: Radiology. OBJECTIVE Rare disease. BACKGROUND Moyamoya disease (MMD) was first described in 1957 as "hypoplasia of the bilateral internal carotid arteries." The characteristic appearance of the associated netw...

Introduction Moyamoya disease is a rare cerebrovascular occlusive disease of unknown etiology, characterized by stenosis or occlusion of both internal carotid arteries (ICAs) at the supraclinoid portion and an abnormal vascular network (moyamoya vessels)(1). 3-T MR angiography clearly shows moyamoya vessels at the base of the brain (2). Gadolinium-enhanced MRI depicts dilated pial vessels (ivy ...

The accessory middle cerebral artery can provide collateral blood supply in moyamoya disease. We report a case of unilateral moyamoya disease which demonstrates the anatomy of the right accessory middle cerebral artery and a ruptured peripheral aneurysm on the artery. Our patient was a 56-year-old woman who initially suffered from headache and lethargy. Right caudate nucleus hemorrhage with int...

Moyamoya disease is a rare, chronic cerebrovascular occlusive disease of unknown etiology. It is characterized by progressive stenosis of the arteries of the circle of Willis leading to ischemic strokes in young people and cerebral hemorrhage, which is more frequent in adults. Secondarily, an abnormal network of fine collateral vessels arises at the base of the brain. The term moyamoya refers t...

Some reports have shown the association between Moyamoya syndrome and autoimmune diseases. Herewith, we present a 3.5 yr old girl with Henoch- Schönleinpurpura (HSP) who was treated with steroids because of sever colicky abdominal pain. However, central nervous system manifestations such as headache, ataxia and vision impairment developed during 6 months of her outpatient follow-up. More evalua...