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Related Experiment Videos

Lichen nitidus: a histologic and electron microscopic study.

M Mihara1, H Nakayama, S Shimao

  • 1Department of Dermatology, Faculty of Medicine, Tottori University, Yonago, Japan.

The Journal of Dermatology
|August 1, 1991
PubMed
Summary

Histology and electron microscopy of lichen nitidus revealed severe edema and mast cell infiltration in the dermal-epidermal junction, suggesting these as primary pathologic changes in the skin condition.

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Area of Science:

  • Dermatopathology
  • Electron Microscopy
  • Histology

Background:

  • Lichen nitidus is a rare inflammatory skin condition.
  • Its precise pathogenesis remains incompletely understood.
  • This study investigates the ultrastructural changes in a lichen nitidus lesion.

Observation:

  • Histological examination confirmed typical features of lichen nitidus.
  • Electron microscopy revealed hydropic degeneration of basal cells, suggesting significant edema.
  • Micro-vacuolar structures were observed in basal keratinocytes.

Findings:

  • Primary changes in lichen nitidus appear to involve severe edema at the dermal-epidermal junction.
  • Mast cells were identified infiltrating the epidermis and scattered in the dermis.

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  • These findings suggest mast cells contribute to the inflammatory process.

    • Implications:

    • Edema and mast cell infiltration may be key initiating factors in lichen nitidus.
    • Understanding these ultrastructural changes can inform future research into treatment strategies.
    • This study provides novel insights into the cellular mechanisms underlying lichen nitidus.