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Related Concept Videos

Capillaries and Their Types01:20

Capillaries and Their Types

Capillaries, a crucial constituent of the circulatory system, are diminutive vessels with a diameter between 5–10 micrometers, accommodating perfusion to the tissues through the phenomenon known as microcirculation. Through their permeable walls, consisting of an endothelial layer ensconced by a basement membrane and sporadically dispersed smooth muscle fibers, the exchange of substances between the blood and the interstitial fluid becomes plausible. Variance in wall composition exists, with...
Capillary Beds01:20

Capillary Beds

Capillary beds are networks of tiny blood vessels that play a crucial role in the circulatory system. These beds are where the exchange of gases, nutrients, and waste products occurs between the blood and surrounding tissues. Each capillary bed consists of numerous capillaries, which are the smallest blood vessels in the body, typically only one cell-thick. This thinness allows for the efficient diffusion of substances.
Capillaries connect arterioles, small branches of arteries, to venules,...
Veins of Head and Neck01:19

Veins of Head and Neck

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Regulation of Angiogenesis and Blood Supply

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Related Experiment Video

Updated: Jul 9, 2026

A Patient-Derived Xenograft Model for Venous Malformation
06:51

A Patient-Derived Xenograft Model for Venous Malformation

Published on: June 15, 2020

Is this really a capillary haemangioma?

Aravind R Reddy1, B Y P Chang, J A Bradbury

  • 1Department of Ophthalmology, Chancellor Wing, St James' University Hospital, Leeds, UK. aravind_1971@yahoo.com

Orbit (Amsterdam, Netherlands)
|December 22, 2007
PubMed
Summary

Periocular tumors in newborns, like capillary hemangiomas, present diagnostic challenges. This report details a large, atypical vascular lesion, emphasizing diagnostic approaches and successful treatment.

Area of Science:

  • Ophthalmology
  • Pediatric Oncology
  • Dermatology

Background:

  • Periocular tumors in newborns require careful diagnosis and management.
  • Capillary hemangiomas are common, but deep-seated orbital lesions can mimic other serious conditions.
  • Accurate diagnosis relies on history, examination, and imaging like ultrasound and MRI/MRA.

Observation:

  • This report focuses on a rare, very large vascular lesion of the lower eyelid with unusual clinical features.
  • The lesion presented diagnostic challenges due to its atypical presentation.
  • The case highlights the importance of considering vascular lesions in the differential diagnosis of pediatric periocular masses.

Findings:

  • The study discusses the diagnostic approach for a large, atypical periocular vascular lesion.

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  • Successful treatment strategies were employed.
  • Histological features of the lesion were analyzed.
  • Implications:

    • This case underscores the need for thorough evaluation of all periocular masses in neonates.
    • Understanding atypical presentations of capillary hemangiomas is crucial for timely and appropriate management.
    • Effective diagnostic and treatment protocols can lead to favorable outcomes for infants with challenging periocular tumors.