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Related Experiment Video

Updated: Mar 5, 2026

Author Spotlight: Development and Evaluation of a Compound Acne Rodent Model Using C. acnes and Oleic Acid
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Lichenoid folliculitis: A unifying concept.

Mamina M Turegano1, Leonard C Sperling2

  • 1Department of Pathology and Laboratory Medicine, Division of Dermatopathology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, Maryland.

Journal of Cutaneous Pathology
|March 28, 2017
PubMed
Summary

Skin conditions with similar clinical and histologic features, previously known by over 30 names, are proposed to be unified under lichenoid folliculitis (LF). This simplifies nomenclature and suggests shared disease pathways.

Keywords:
cicatricial alopeciakeratosis pilaris atrophicanslichen planopilarislichenoid folliculitisscarring alopecia

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Area of Science:

  • Dermatology
  • Pathology
  • Genetics

Background:

  • Numerous skin diseases share features like keratotic papules, atrophy, and cicatricial alopecia.
  • These conditions are often classified into keratosis pilaris atrophicans (KPA) and lichen planopilaris (LPP) subgroups.
  • Histopathologic data for KPA is limited, despite characteristic interface dermatitis in LPP.

Purpose of the Study:

  • To analyze the clinical and histopathologic overlap between KPA and LPP disease groups.
  • To propose a unifying term for these related skin conditions.
  • To simplify the complex nomenclature and explore shared pathogenesis.

Main Methods:

  • Review of clinical presentations and histopathologic findings of patients with KPA and LPP.
  • Comparative analysis of shared features across the two subgroups.
  • Literature review on existing nomenclature and proposed classifications.

Main Results:

  • Significant clinical and histologic similarities were identified between the KPA and LPP subgroups.
  • The proposed unifying term, lichenoid folliculitis (LF), encompasses diseases previously described under diverse names.
  • Histologic findings suggest a common underlying inflammatory process.

Conclusions:

  • The term lichenoid folliculitis (LF) is proposed to consolidate over 30 distinct diagnoses with overlapping clinical and histologic features.
  • This simplification aids in understanding potential shared pathogenesis and treatment strategies.
  • Further research into the unifying pathogenesis of LF is warranted.