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Related Concept Videos

Varicose Veins I: Introduction01:26

Varicose Veins I: Introduction

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Varicose veins, or varicosities, are abnormally dilated and twisted superficial veins caused by venous valve incompetence. This condition commonly affects the lower extremities, especially the saphenous veins, due to the higher pressure from prolonged standing and walking. However, varicosities can also occur in other areas, such as the esophagus, vulva, spermatic cords, and anorectal region.Etiology and typesPrimary varicose veins, often idiopathic, are more common in women due to inherent...
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Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies01:20

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The key difference between Superficial Vein Thrombosis (SVT) and Deep Vein Thrombosis (DVT) lies in their location and severity.Clinical ManifestationsSVT typically presents with localized pain, tenderness, and redness along the course of a superficial vein, often accompanied by a palpable, cord-like structure under the skin. This condition is usually less dangerous than DVT but can be uncomfortable and may lead to complications such as cellulitis or, rarely, a clot extension into the deep...
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Venous Thrombosis I: Introduction01:30

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Venous thrombosis, the most common disorder of the veins, involves the formation of a thrombus or blood clot associated with vein inflammation. It can be classified as either superficial vein thrombosis or deep vein thrombosis.Superficial Vein Thrombosis: This involves the formation of a thrombus in a superficial vein, usually the greater or lesser saphenous vein. Though less severe than deep vein thrombosis (DVT), SVT can lead to complications if untreated.Deep Vein Thrombosis (DVT): This...
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Veins01:17

Veins

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Veins are an integral part of our circulatory system, serving as the blood vessels that transport blood from all body regions to the heart. They are a network of hollow tubes that carry blood low in oxygen from the body's cells back to the heart for reoxygenation. Veins are crucial for maintaining the body's overall fluid balance and the continuous circulation of blood.
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The development of lymphatic tissues and vessels in embryonic life begins around the fifth week. These structures originate from the mesoderm layer, with lymph sacs emerging from developing veins.
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Varicose veins, or varicosities, develop when the valves in the veins, which control blood flow, weaken or damage. It causes blood to pool and the veins to enlarge. Understanding the clinical manifestations, diagnostic approaches, and management options for varicose veins is crucial for effective treatment and relief.Clinical manifestationsClinical manifestations of varicose veins include a heavy, achy feeling or pain after prolonged standing or sitting. This discomfort can often be relieved by...
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A Patient-Derived Xenograft Model for Venous Malformation
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Developmental venous anomalies.

Michael A Mooney1, Joseph M Zabramski1

  • 1Department of Neurosurgery, Barrow Neurological Institute, St. Joseph's Hospital and Medical Center, Phoenix, AZ, USA.

Handbook of Clinical Neurology
|May 30, 2017
PubMed
Summary
This summary is machine-generated.

Developmental venous anomalies (DVAs) are common, benign congenital brain vascular malformations. Conservative management is preferred due to risks associated with surgical or endovascular obliteration of DVAs.

Keywords:
developmental venous anomalyvenous angiomavenous malformationvenous medullary malformation

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Area of Science:

  • Neurology
  • Vascular Malformations
  • Neuroimaging

Background:

  • Developmental venous anomalies (DVAs) are common congenital brain vascular malformations, found in up to 3% of the population.
  • Characterized by the convergence of veins into a single dilated channel, DVAs are often incidental findings on neuroimaging.
  • Also known as cerebral venous angiomas or malformations, they are the most frequent type of cerebral vascular malformation.

Purpose of the Study:

  • To summarize the characteristics and management of developmental venous anomalies.
  • To highlight the natural history and potential complications associated with DVAs.
  • To emphasize the recommended treatment approach for DVAs.

Main Methods:

  • Review of existing literature on developmental venous anomalies.
  • Analysis of neuroimaging findings and autopsy studies.
  • Evaluation of clinical outcomes and treatment strategies for DVAs.

Main Results:

  • DVAs are congenital lesions arising from developmental venous aberrations, providing normal drainage.
  • While generally benign, DVAs can be associated with cavernous malformations, increasing hemorrhage risk.
  • Surgical or endovascular treatment carries significant risks of venous infarction.

Conclusions:

  • Conservative management is the preferred treatment for DVAs.
  • Understanding the association with other vascular abnormalities is crucial for risk assessment.
  • DVAs represent a common yet complex area within cerebrovascular malformations.