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Related Experiment Videos

Hair casts: a clinical and electron microscopic study.

W Y Zhu1, M Y Xia, J H Wu

  • 1Department of Dermatology, Nanjing Medical College, People's Republic of China.

Pediatric Dermatology
|December 1, 1990
PubMed
Summary

Hair casts, affecting young girls, may be caused by tight hairstyles like ponytails and braids. These styles might lead to scalp inflammation and circulatory issues, contributing to the condition.

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Area of Science:

  • Dermatology
  • Pediatric Dermatology
  • Hair and Scalp Disorders

Background:

  • Hair casts are an observed phenomenon in pediatric patients.
  • The specific etiology and contributing factors for hair casts require further elucidation.

Purpose of the Study:

  • To investigate the clinical presentation and potential causes of hair casts in young girls.
  • To identify microscopic and elemental characteristics of hair casts.

Main Methods:

  • Clinical observation of 22 girls (ages 4-13) with hair casts.
  • Microscopic examination including scanning and transmission electron microscopy.
  • Chemical analysis using energy-dispersive x-ray microanalysis.

Main Results:

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  • Hair casts were observed in frontal, vertex, and temporal areas, affecting 10-33% of hairs.
  • Twenty girls wore ponytails or pigtails; compound root sheath casts were noted in 6/9 patients.
  • Microscopy revealed scales and spores; elemental analysis detected silicon, aluminum, and molybdenum in hair casts.

    • Conclusions:

    • Tight hairstyles, such as ponytails and braids, are hypothesized as a potential etiologic factor.
    • Local circulatory disturbances and scalp inflammation may result from tight hairstyles, contributing to hair cast formation.