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Related Concept Videos

Pigmentation01:19

Pigmentation

The color of the skin is influenced by a number of pigments, including melanin, carotene, and hemoglobin. Recall that melanin is produced by cells called melanocytes, which are found scattered throughout the stratum basale of the epidermis. The melanin is transferred to the keratinocytes via melanosomes.
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Related Experiment Video

Updated: May 17, 2026

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
12:37

Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model

Published on: September 7, 2013

Photodermatoses in pigmented skin.

Vinod Kumar Sharma1, Kanika Sahni, Ashok Roopchand Wadhwani

  • 1Department of Dermatology and Venereology, All India Institute of Medical Sciences, Ansari Nagar, New Delhi-110029, India. aiimsvks@yahoo.com

Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology
|November 6, 2012
PubMed
Summary
This summary is machine-generated.

Dark skin has natural photoprotection, yet photodermatoses are common. Lichenoid variants of polymorphous light eruption and actinic lichen planus are more frequent in dark skin.

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Area of Science:

  • Dermatology
  • Photobiology
  • Immunodermatology

Background:

  • Photodermatoses are skin conditions triggered by UV and visible radiation.
  • Sunlight's effect on skin varies with melanin content, type, and skin phototype.
  • Limited research exists on photodermatoses in individuals with dark skin.

Purpose of the Study:

  • To review the biological differences in melanin between dark and light skin.
  • To summarize current knowledge on photodermatoses in dark-skinned populations.
  • To identify variations in photodermatoses presentation in dark skin.

Main Methods:

  • A PubMed search was performed.
  • Literature review focused on melanin biology and photodermatoses in dark skin.
  • Analysis of reported photodermatoses prevalence and types in dark-skinned individuals.

Main Results:

  • Dark skin exhibits higher melanin content, a greater eumelanin/pheomelanin ratio, and more effective UV protection.
  • Polymorphous light eruption (PMLE) is the most common photodermatosis in dark skin.
  • Lichenoid variants of PMLE and actinic lichen planus are more prevalent in dark skin, while actinic prurigo, solar urticaria, and hydroa vacciniforme are less common.

Conclusions:

  • Photodermatoses occur frequently in dark-skinned individuals despite inherent photoprotection.
  • Specific photodermatoses, particularly lichenoid forms, show increased prevalence in dark skin.
  • Lichenoid photodermatoses may warrant inclusion in the classification of photodermatoses for dark skin.