Pediatric Moyamoya disease

Mohamed Nagiub1, Iqbal Allarakhia

  • 1Department of Pediatrics, St. John Providence Children's Hospital, Detroit, Michigan, U.S.A.

Insights

Moyamoya disease (MMD) is a rare cerebrovascular condition affecting children, particularly in East Asia. Early diagnosis through clinical evaluation and imaging, confirmed by conventional angiography, is crucial for effective management and surgical planning.

Area of Science:

  • Neurology
  • Vascular Medicine
  • Pediatric Neurology

Background:

  • Moyamoya disease (MMD) is a progressive cerebrovascular occlusive disease affecting bilateral internal carotid arteries.
  • It causes a compensatory abnormal vascular network at the base of the brain.
  • MMD is the most common pediatric cerebrovascular disease in East Asia, with lower incidence in the USA.

Purpose of the Study:

  • To present a case of Moyamoya disease in a pediatric patient.
  • To highlight diagnostic considerations for MMD.

Main Methods:

  • Case report of a 7-year-old female presenting with transient altered mental status.
  • Diagnostic evaluation included history, physical examination, and brain imaging.
  • Conventional angiography was utilized for definitive diagnosis.

Main Results:

  • The patient was diagnosed with Moyamoya disease.
  • Conventional angiography confirmed the diagnosis and provided information for surgical planning.

Conclusions:

  • A high index of suspicion based on clinical presentation and imaging is key for diagnosing Moyamoya disease.
  • Conventional angiography is the gold standard for diagnosis and surgical planning in MMD patients.
Abstract

Related Concept Videos

Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
Hemorrhagic Stroke l: Introduction01:17

Hemorrhagic Stroke l: Introduction

A hemorrhagic stroke is an acute neurological event that occurs when a weakened cerebral blood vessel ruptures, allowing blood to accumulate within or around the brain. The sudden release of blood forms a focal hematoma that increases intracranial pressure, displaces neural tissue, and can obstruct cerebrospinal fluid pathways. These effects may be compounded by intraventricular extension of the hemorrhage, cerebral edema, or compression of adjacent structures, all of which contribute to...
Mitral Stenosis III: Medical Management01:26

Mitral Stenosis III: Medical Management

Mitral stenosis, a condition marked by the narrowing of the mitral valve, necessitates an integrated approach for effective management. This approach includes preventative measures, medical therapy, and surgical interventions to reduce symptoms and prevent complications.PreventionPrevention of mitral stenosis primarily focuses on reducing the incidence of bacterial infections, particularly streptococcal infections, which can lead to rheumatic fever and subsequent valvular damage. Timely...
Transient Ischemic Attack l: Introduction01:26

Transient Ischemic Attack l: Introduction

A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this barrier loses...
Mitral Stenosis I: Introduction01:22

Mitral Stenosis I: Introduction

Mitral Valve Stenosis (MVS) is a heart condition where the mitral valve narrows, impeding blood circulation from the left atrium to the left ventricle. The etiology and pathophysiology of this condition are multifaceted, leading to a cascade of cardiovascular complications.Causes of Mitral Valve StenosisRheumatic Heart Disease: It is the main cause of mitral valve stenosis, particularly in developing nations. This condition arises from rheumatic fever, an inflammatory illness resulting from...