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Related Concept Videos

Acne Infection01:27

Acne Infection

39
Acne is a multifactorial skin condition primarily affecting adolescents and young adults, with a global prevalence estimated to exceed 75% in this demographic. The condition is characterized by the formation of comedones (blackheads and whiteheads), papules, pustules, nodules, and, in severe cases, cysts, particularly in areas rich in sebaceous glands such as the face, neck, chest, and back. The pathogenesis involves increased sebum production, follicular hyperkeratinization, colonization by...
39

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Author Spotlight: Development and Evaluation of a Compound Acne Rodent Model Using C. acnes and Oleic Acid
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Follicular fluorescence quantity to characterize acne severity: a validation study.

C Richter1, C Trojahn2, G Dobos2

  • 1Charité-Universitätsmedizin Berlin, Department of Dermatology and Allergy, Clinical Research Center for Hair and Skin Science, Berlin, Germany. claudia.richter@charite.de.

Skin Research and Technology : Official Journal of International Society for Bioengineering and the Skin (ISBS) [And] International Society for Digital Imaging of Skin (ISDIS) [And] International Society for Skin Imaging (ISSI)
|January 26, 2016
PubMed
Summary
This summary is machine-generated.

Fluorescence quantity, measured under ultraviolet-A light, can indicate acne severity, particularly on the inner cheek and chin. While reliable, this method is less sensitive than manual lesion counting for assessing acne.

Keywords:
acnefluorescenceimagingreliabilitysebumvalidity

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Area of Science:

  • Dermatology
  • Biophotonics
  • Medical Imaging

Background:

  • Porphyrins, native fluorophores in hair follicles, are detectable under ultraviolet-A light.
  • Increased Propionibacterium acnes colonization in acne may correlate with higher porphyrin production.
  • Investigating fluorescence quantity as a potential biomarker for acne severity.

Purpose of the Study:

  • To determine if fluorescence quantity can be utilized as a quantitative measure of acne severity.
  • To validate fluorescence quantity as a reliable and sensitive indicator of acne progression.

Main Methods:

  • A split-face validation study involving 24 acne patients.
  • Acne severity assessed using Investigator Static Global Assessment (ISGA) scores and lesion counts.
  • Evaluation of fluorescence quantity's reliability, construct validity, and sensitivity to change.

Main Results:

  • Mean baseline ISGA scores were 2.7. Baseline fluorescence quantities averaged 24.8 on the cheek and 20.3 on the chin.
  • Post-treatment fluorescence quantities showed significant reduction, with effect sizes ranging from 0.24 to 0.77.
  • High intraclass correlation coefficients (0.513–0.987) indicated good reliability for fluorescence quantity measurements.

Conclusions:

  • Fluorescence quantity serves as a reliable indicator of acne severity, especially in the inner cheek and chin regions.
  • While reliable, fluorescence quantity measurements demonstrated lower sensitivity compared to traditional manual lesion counting for assessing acne.
  • The findings suggest potential for fluorescence imaging in acne assessment, with further refinement needed for optimal sensitivity.