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Ultrastructural changes in acquired perforating dermatosis.

J W Patterson1, P C Brown

  • 1Department of Pathology, Medical College of Virginia, School of Medicine and Dentistry, Richmond 23298.

International Journal of Dermatology
|March 1, 1992
PubMed
Summary
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Ultrastructural studies reveal acquired perforating dermatosis involves early inflammatory cell exocytosis and elastic fiber changes. Hair fragments may contribute to pathogenesis in some cases.

Area of Science:

  • Dermatopathology
  • Electron Microscopy
  • Skin Biology

Background:

  • Acquired perforating dermatosis (APD) is a rare skin condition.
  • APD often affects patients with diabetes mellitus or chronic kidney disease.
  • The precise ultrastructural changes in APD remain incompletely understood.

Purpose of the Study:

  • To elucidate the ultrastructural pathology of acquired perforating dermatosis.
  • To identify key cellular and extracellular changes during lesion development.
  • To explore potential pathogenetic mechanisms in APD.

Main Methods:

  • Ultrastructural examination (electron microscopy) of skin biopsy specimens from seven adult patients with APD.
  • Detailed analysis of early, intermediate, and late-stage lesions.

Related Experiment Videos

  • Correlation of ultrastructural findings with clinical data, including diabetes mellitus and hemodialysis status.

    • Main Results:

    • Early lesions show inflammatory cell exocytosis and altered elastic fibers.
    • Intermediate lesions exhibit basement membrane discontinuities, dermal edema, macrophages, and aggregated collagen.
    • Later lesions feature fibroblasts, degenerated elastic fibers within transepidermal channels, and epidermal channels containing diverse materials. Hair fragments were noted in one case.

    Conclusions:

    • Exocytosis of inflammatory cells and elastica alterations are early, potentially key events in APD development.
    • Altered keratinization is localized near transepidermal channels.
    • Hair fragments may play a role in the pathogenesis of some APD cases.