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The skin is divided into epidermis, dermis, and hypodermis, the skin's outermost, middle, and inner layers. The human epidermal layer regularly undergoes renewal, where old, dead cells are replaced by new cells. Epidermal stem cells or EpiSCs divide and differentiate to restore the lost cells. For the renewal process, some EpiSCs continuously self-renew. In contrast, few others differentiate into transit-amplifying cells, which later form prickle or spinous cells, followed by granular...
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[Endogenous skin overloads].

Nicolas Ortonne1

  • 1Département de Pathologie, université Paris Est Créteil (UPEC), hôpital Henri-Mondor, AP-HP, 1, rue Gustave Eiffel, 94000 Créteil, France.

Annales De Pathologie
|October 5, 2024
PubMed
Summary

Diagnosing subtle skin diseases like cutaneous amyloidosis and calciphylaxis relies on histopathology. Careful examination and special stains are crucial for identifying these "invisible" dermatoses and ruling out serious conditions.

Keywords:
Amylose cutanéeCalciphylaxieCalciphylaxisCutaneous amyloidosisCutaneous xanthomaMucinoseMucinosisXanthome cutané

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Area of Science:

  • Dermatopathology
  • Histopathology
  • Cutaneous Oncology

Background:

  • Endogenous cutaneous overload diseases often present with subtle or

Purpose of the Study:

  • To highlight the importance of histopathological analysis in diagnosing subtle cutaneous diseases.
  • To emphasize the role of special stains in identifying specific dermatoses.
  • To underscore the necessity of clinical-pathological correlation for accurate diagnosis and prognosis.

Main Methods:

  • Histopathological examination of skin lesions.
  • Application of special stains such as Alcian blue.
  • Systematic sectioning to identify diagnostic features.
  • Clinical-pathological correlation.

Main Results:

  • Subtle dermatoses like primary macular cutaneous amyloidosis and calciphylaxis may be missed clinically.
  • Superficial dermal melanosis indicates post-inflammatory changes.
  • Special stains aid in identifying dermal mucinosis and specific cellular markers.
  • Certain conditions are associated with underlying systemic diseases (e.g., monoclonal gammopathies) or visceral damage.

Conclusions:

  • Histopathological analysis with special stains is essential for diagnosing "invisible" dermatoses.
  • Accurate diagnosis requires integrating clinical findings with histopathological results.
  • Distinguishing between primary cutaneous and systemic diseases is critical for patient management and prognosis.