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Updated: May 24, 2026

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Trichoscopy update 2011.

Lidia Rudnicka1, Małgorzata Olszewska, Adriana Rakowska

  • 1Department of Dermatology, CSK MSWiA, Warsaw, Poland.

Journal of Dermatological Case Reports
|March 13, 2012
PubMed
Summary
This summary is machine-generated.

Trichoscopy, a non-invasive diagnostic tool, aids in differentiating hair and scalp diseases. This review details key trichoscopic findings for non-cicatricial alopecia, cicatricial alopecia, hair shaft disorders, and scalp inflammation.

Keywords:
UValopeciadermoscopyhairlichen planopilarislupuspsoriasisseborheic dermatitistrichoscopyvideodermoscopy

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Area of Science:

  • Dermatology
  • Trichology

Background:

  • Trichoscopy, utilizing dermoscopy or videodermoscopy, is crucial for diagnosing hair and scalp conditions.
  • Current research focuses on trichoscopic evaluation of non-cicatricial alopecia, cicatricial alopecia, hair shaft disorders, and inflammatory scalp diseases.

Purpose of the Study:

  • This review synthesizes current knowledge on trichoscopic findings across four major categories of hair and scalp diseases.
  • To provide a comprehensive overview of trichoscopy's utility in differential diagnosis.

Main Methods:

  • Review of current literature on trichoscopy in hair and scalp diseases.
  • Summarization of characteristic trichoscopic findings for various alopecias, hair shaft abnormalities, and scalp inflammatory conditions.

Main Results:

  • Non-cicatricial alopecias often show empty follicular openings; specific findings like black dots and yellow dots aid in diagnosing alopecia areata and androgenic alopecia.
  • Cicatricial alopecias present with milky-red or ivory-white areas lacking follicular openings, with distinct features for lichen planopilaris, frontal fibrosing alopecia, folliculitis decalvans, and dissecting cellulitis.
  • Trichoscopy effectively diagnoses hair shaft disorders (e.g., trichorrhexis nodosa) and inflammatory scalp diseases (e.g., lupus erythematosus, psoriasis, seborrheic dermatitis, tinea capitis), with UV-light enhanced trichoscopy aiding tinea capitis diagnosis.

Conclusions:

  • Trichoscopy is an indispensable, non-invasive method for the differential diagnosis of most hair and scalp diseases.
  • The review highlights specific, differentiating trichoscopic features for a wide range of dermatological conditions affecting the hair and scalp.