Moyamoya-like vasculopathy and Seckel syndrome: just a coincidence?

Ralph Rahme1, Louis Crevier, Josée Dubois

  • 1Division of Neurosurgery, CHU Sainte-Justine, University of Montreal, Montreal, Quebec, Canada.

Abstract

Insights

Seckel syndrome (SS) and other microcephalic primordial dwarfisms (MPDs) are linked to cerebrovascular anomalies. Patients with MPD presenting with stroke symptoms require prompt cerebral vessel imaging.

Area of Science:

  • Neurology
  • Genetics
  • Pediatrics

Background:

  • Seckel syndrome (SS) and microcephalic primordial dwarfisms (MPDs) are rare autosomal recessive disorders.
  • These conditions involve severe growth retardation, microcephaly, and distinctive facial features.
  • MPDs are increasingly associated with cerebrovascular abnormalities like aneurysms and moyamoya disease.

Observation:

  • An 18-year-old female with SS and intellectual disability presented with subarachnoid hemorrhage.
  • She had a history of multifocal ischemic strokes at age 3.
  • Cerebral angiography revealed bilateral internal carotid artery narrowing, ICA obliteration, and multiple aneurysms on posterior cerebral arteries.

Findings:

  • The patient's imaging demonstrated significant cerebrovascular anomalies, including stenosis and aneurysms.
  • No moyamoya collaterals were observed.
  • Given the high risks, invasive treatment was declined, and palliative care was provided.

Implications:

  • Patients with MPDs exhibit a predisposition to developing cerebrovascular anomalies.
  • Cerebral vessel imaging is crucial for MPD patients experiencing neurological events like ischemia or stroke.
  • Early detection and management strategies for cerebrovascular complications in MPD are warranted.

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...
Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
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...
Vascular Spasm01:16

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...
Coronary Artery Disease II: Pathophysiology01:26

Coronary Artery Disease II: Pathophysiology

Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
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...