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Mechanism of Angiogenesis

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Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...

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A Patient-Derived Xenograft Model for Venous Malformation

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Published on: June 15, 2020

Hemangioma: Recent Advances.

Austin DeHart¹, Gresham Richter¹

¹Otolaryngology, Head and Neck Surgery, Arkansas Children's Hospital at the University of Arkansas for Medical Science, Little Rock, Arkansas, 72202, USA.

|December 7, 2019

Summary

Hemangiomas are common childhood vascular tumors. Treatment for symptomatic hemangiomas is multimodal, including medications, surgery, or laser therapy, depending on lesion characteristics.

Area of Science:

Pediatric Medicine
Dermatology
Vascular Biology

Background:

Hemangiomas are frequent benign vascular tumors in children.
Diagnosis relies on clinical assessment, supplemented by ultrasound or MRI when needed.
While often benign, some hemangiomas indicate syndromes or visceral issues.

Purpose of the Study:

To review the diagnosis and management of hemangiomas.
To outline treatment strategies for symptomatic lesions.
To discuss multimodal approaches for optimal outcomes.

Main Methods:

Clinical history and physical examination.
Diagnostic imaging: ultrasound and MRI.
Review of current therapeutic modalities.

Keywords:

Hemangioma vascular anomaly

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Main Results:

Symptomatic hemangiomas can cause ulceration, bleeding, vision issues, functional deficits, or disfigurement.
Conservative management is suitable for most small, asymptomatic lesions.
Multimodal treatment is often required for symptomatic or complex cases.

Conclusions:

Effective management of hemangiomas requires tailored, often multimodal, therapeutic plans.
Treatment choice depends on hemangioma size, location, and involvement of critical structures.
Medical, surgical, and laser therapies are key components in optimizing long-term results.