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Related Concept Videos

Skin Cancer01:30

Skin Cancer

Skin cancer is a type of cancer that occurs when there is an abnormal growth of skin cells, usually triggered by damage to the DNA within the skin cells. It is primarily caused by exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds. Skin cancer is the most common type of cancer worldwide, and its incidence continues to rise.
Basal Cell Carcinoma (BCC): BCC is the most common type of skin cancer, accounting for about 80% of cases. It typically develops in...
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Papillary Dermis

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The dermis might be considered the "core" of the integumentary system, as distinct from the epidermis and hypodermis. It contains blood and lymph vessels, nerves, and other structures, such as hair follicles and sweat glands. The dermis is made of two layers of connective tissue that comprise an interconnected mesh of elastin and collagenous fibers, produced by fibroblasts.
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Changes in Skin Color: Clinical Perspectives

The first thing a clinician sees is the skin, so the examination of the skin should be part of any thorough physical examination. Most skin disorders are relatively benign, but a few, including melanomas, can be fatal if untreated. A couple of the more noticeable disorders, albinism and vitiligo, affect the appearance of the skin and its accessory organs.
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Updated: May 20, 2026

Anterior High-Resolution Optical Coherence Tomography in the Diagnosis and Therapeutic Monitoring of Ocular Surface Squamous Neoplasia
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Published on: August 9, 2024

Nevus oligemicus: a case series.

A Batalla1, A Flórez, C Posada

  • 1Department of Dermatology, Complejo Hospitalario de Pontevedra, Pontevedra, Spain.

Journal of the European Academy of Dermatology and Venereology : JEADV
|July 5, 2012
PubMed
Summary
This summary is machine-generated.

Nevus oligemicus, a rare vascular condition, presents as livid patches with localized hypothermia. This report details five new cases, highlighting common patient characteristics like being overweight and sedentary.

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Area of Science:

  • Dermatology
  • Vascular Medicine

Background:

  • Nevus oligemicus is a functional nevus resulting from abnormal adrenergic receptor responses affecting cutaneous vascular plexuses.
  • Characterized by vasoconstriction of deep vessels and superficial vasodilation.
  • Previously reported in only 14 cases across 8 articles in indexed literature.

Observation:

  • Presents five new cases of nevus oligemicus (2 males, 3 females).
  • All observed patients were overweight and led sedentary lifestyles.
  • Clinical presentation includes livid and cyanotic patches with localized hypothermia.

Findings:

  • Nevus oligemicus is an uncommon condition.
  • Key diagnostic sign is localized hypothermia.
  • The condition is asymptomatic and stable over time.

Implications:

  • Suggests nevus oligemicus may be underdiagnosed due to its asymptomatic nature.
  • Highlights the association with overweight and sedentary habits.
  • Contributes to the limited literature on this rare vascular nevus.