BACKGROUND AND PURPOSE Moyamoya disease is a cerebrovascular disease of unknown cause that mainly affects Japanese children. The incidence of familial occurrence accounts for 9% of cases. The characteristic lesions of moyamoya disease are occasionally seen in neurofibromatosis type 1, of which the causative gene (NF1) has been assigned to chromosome 17q11.2. METHODS To determine whether a gen...

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...

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...

A previously healthy 4-year-old female presented with an 18-month history of frequent headaches and seizures. Magnetic resonance imaging (MRI) and angiography revealed severe stenosis of the left proximal intracranial carotid artery, with bilateral development of moyamoya vessels, left greater than right. A diagnosis of moyamoya disease was made, and the patient was scheduled for surgical corre...

The role of radiotherapy in the management of patients with optic pathway glioma is controversial. In a series of patients with optic pathway glioma treated at The Hospital for Sick Children in Toronto, five children were encountered who developed moyamoya phenomenon after radiotherapy. A retrospective review of the medical records was undertaken in order to assess the relationship between opti...

It is well known that neurofibromatosis is one apparent etiology for the type of intracranial arterial occlusive disease known as moyamoya disease [1-4]. All previously reported cases of neurofibromatosis with moyamoya disease have had involvement only of the intracranial carotid circulation (supraclinoid internal carotid artery, middle cerebral artery, anterior cerebral artery) [1 -4]. We repo...

BACKGROUND AND PURPOSE Revascularization surgery for moyamoya patients is believed to prevent cerebral ischemic attacks by improving cerebral blood flow. However, measures preventing the occurrence of hemorrhagic moyamoya in patients have not yet been established in the literature due to the low rate of hemorrhage onset as well as the originally limited numbers of patients with moyamoya disease...

Background and Purpose—Revascularization surgery for moyamoya patients is believed to prevent cerebral ischemic attacks by improving cerebral blood flow. However, measures preventing the occurrence of hemorrhagic moyamoya in patients have not yet been established in the literature due to the low rate of hemorrhage onset as well as the originally limited numbers of patients with moyamoya disease...

BACKGROUND AND PURPOSE There is a scarcity of information on the epidemiology and natural course of moyamoya disease. The aim of this study was to investigate the nationwide epidemiological features of moyamoya disease in Korea, including incidence, prevalence, and survival. METHODS We used the data from nationwide, population-based Health Insurance Review and Assessment Service claims databa...