Dr. Muhammet Özgehan
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Medical Hair Encyclopedia

Dermatological pathologies and evidence-based clinical guidelines at international standards.

CLINICAL GUIDELINE & PATHOLOGY

Guide to Hair Shaft Disorders and Structural Anomalies

Prepared by: Dr. Muhammet Özgehan | Turkish Hair and Scalp Diseases Association

This guide has been compiled by Dr. Muhammet Özgehan in light of current literature.

Clinical and Medical Illustration of Hair Shaft Disorders and Hair Fiber Anomalies

📌 Patient Information Section: What Does This Condition Mean?

Disorders in this group, rather than involving inflammation or shedding of hair follicles, are characterized by a genetically or structurally weak, fragile, or loosely attached hair fiber (shaft) to the root. It is non-scarring.

  • Loose Anagen Syndrome (LAS): Typically observed in childhood. Hair does not firmly adhere to the scalp; it easily detaches painlessly from the root with very light combing or pulling.
  • Trichorrhexis Nodosa (Brittle Hair): This condition involves the formation of weak and fragile nodules along the hair shaft, causing the hair to easily break at these points.
  • Monilethrix and Pili Torti: These are microscopic anomalies where hair strands appear beaded or twisted around their own axis.

🩺 Clinical & Medical Guide for Physicians

  • Diagnostic Criteria and Findings:
    • Loose Anagen Syndrome: In the pull test, numerous anagen hairs with their root sheaths detach painlessly with a single gentle pull. Additionally, specialized expertise and treatment approaches may be considered for clinical evaluations.
    • Trichorrhexis Nodosa: Under microscopy, the fractured ends resemble two pressed-together brushes (brush-like appearance).
  • Management and Treatment Protocols:
    • Family Education: Information that conditions like Loose Anagen Syndrome are benign and tend to improve with age.
    • Care Guide: Avoidance of harsh brushing, blow-dry heat, and chemical treatments; biotin and supportive supplements.

Scientific References and Bibliography

  • Bhat YJ, Trumboo T, Krishan K. Hair Shaft Disorders in Children - An Update. Indian Dermatol Online J. 2023 Feb 23;14(2):163-171. doi: 10.4103/idoj.idoj_7_22. PMID: 37089857; PMCID: PMC10115339. PubMed Link
  • Rudnicka L, Olszewska M, Waśkiel A, Rakowska A. Trichoscopy in Hair Shaft Disorders. Dermatol Clin. 2018 Oct;36(4):421-430. doi: 10.1016/j.det.2018.05.009. Epub 2018 Aug 16. PMID: 30201151. PubMed Link
  • Drivenes JL, Bygum A, Hertz JM, Grimalt R, Puente-Pablo N. [Congenital hair shaft anomalies]. Ugeskr Laeger. 2021 May 31;183(22):V02210125. Danish. PMID: 34060455. PubMed Link
  • Itin PH. Haarschaftanomalien [Hair shaft anomalies]. Praxis (Bern 1994). 1997 Jun 4;86(23):982-6. German. PMID: 9289799. PubMed Link