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Related Experiment Videos

Merkel cells, normal and neoplastic: an update.

Gurdip S Sidhu1, Pranil Chandra, Nicholas D Cassai

  • 1The New York Harbor Healthcare System and New York University School of Medicine, New York, New York 10010, USA. deepsidhu@optoline.net

Ultrastructural Pathology
|July 23, 2005
PubMed
Summary

Merkel cells (MC) are crucial for skin structure and mechanoreception. Merkel cell carcinomas (MCC), derived from these cells, can be aggressive, particularly those with a small cell pattern.

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Area of Science:

  • Dermatology
  • Cell Biology
  • Oncology

Background:

  • Merkel cells (MC) are specialized cells in the epidermis and oral mucosa, interacting with sensory nerves.
  • MCs play roles in mechanoreception and maintaining epidermal structure.
  • They possess neuroendocrine granules and unique cellular junctions.

Purpose of the Study:

  • To describe the characteristics and origin of Merkel cells.
  • To detail the histopathological features of Merkel cell carcinomas (MCC).
  • To correlate MCC patterns with clinical behavior.

Main Methods:

  • Histopathological examination of Merkel cell carcinomas.
  • Immunohistochemical staining for cytokeratin 20.
  • Review of clinical data and patient outcomes.

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Main Results:

  • Merkel cells originate from basal cells and have specific cellular structures.
  • MCCs exhibit trabecular, intermediate, or small cell patterns.
  • Small cell and some intermediate pattern MCCs are aggressive and rapidly fatal.

Conclusions:

  • Merkel cells are integral to skin function and structure.
  • Merkel cell carcinoma exhibits diverse histopathological patterns.
  • Prognosis of MCC is linked to its cellular morphology, with small cell types being highly aggressive.