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Related Concept Videos

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...
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In Vitro Three-Dimensional Sprouting Assay of Angiogenesis Using Mouse Embryonic Stem Cells for Vascular Disease Modeling and Drug Testing
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[Hereditary hemorrhagic telangiectasia].

Henri Plauchu1, Sophie Dupuis-Girod

  • 1Centre national de références Maladie de Rendu-Osler, Service de génétique clinique, hôpital Hôtel-Dieu, Université Claude Bernard-Lyon 1,69288 Lyon Cedex 02, France. henri.plauchu@chu-lyon.fr

La Revue Du Praticien
|October 21, 2009
PubMed
Summary

Hereditary hemorrhagic telangiectasia (HHT) is an inherited vascular disorder causing bleeding and abnormal blood vessels. Early detection and management of symptoms like epistaxis and arteriovenous malformations are key.

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Area of Science:

  • Genetics and vascular biology
  • Autosomal dominant inheritance patterns
  • TGF-beta signaling pathway

Context:

  • Hereditary hemorrhagic telangiectasia (HHT), or Osler-Weber-Rendu disease, is a rare genetic vascular disorder.
  • Prevalence in France estimated at 1/6,000 to 1/8,500.
  • Characterized by telangiectases and arteriovenous malformations (AVMs).

Purpose:

  • To summarize the clinical presentation, diagnosis, genetic basis, and management of HHT.
  • To highlight the variability of visceral complications.
  • To emphasize the role of early detection and interventional radiology.

Summary:

  • HHT diagnosis is clinical, based on epistaxis, telangiectases, and family history, with nearly complete penetrance by age 50.
  • Visceral AVMs (pulmonary, neurological, hepatic, digestive) cause diverse complications, including anemia, hypoxia, and stroke.
  • Genetic factors involve ALK1 and ENG genes, impacting vascular homeostasis and leading to AVMs.

Impact:

  • Improved understanding of HHT's genetic and clinical spectrum.
  • Highlights the importance of managing anemia and epistaxis.
  • Stresses the critical role of early AVM detection and interventional radiology for patient outcomes.