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Basaloid Cell Hyperplasia Overlying Dermatofibroma.

Izarra Pablo1, Zohdy Marwa2, Beltraminelli Helmut3

  • 1Department of Dermatology, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland.

Dermatopathology (Basel, Switzerland)
|October 24, 2025
PubMed
Summary
This summary is machine-generated.

Basaloid cell hyperplasia overlying dermatofibromas shares histological similarities with basal cell carcinoma, complicating diagnosis. Further molecular techniques may be needed to accurately differentiate these conditions.

Keywords:
Ber-EP4CK-20Ki-67basal cell carcinomabasaloid cell hyperplasiadermatofibroma

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Area of Science:

  • Dermatopathology
  • Oncology

Background:

  • Dermatofibromas (DFs) are common benign skin neoplasms.
  • Basaloid cell hyperplasia (BCH) can overlie DFs, mimicking basal cell carcinoma (BCC).
  • Distinguishing BCH in DFs from superficial BCC is diagnostically challenging.

Purpose of the Study:

  • To determine if BCH overlying DFs can be histologically and immunohistochemically distinguished from superficial BCC.
  • To investigate the nature of basaloid cell proliferation in DFs.

Main Methods:

  • Histological examination of 43 DF samples with overlying BCH.
  • Immunohistochemical analysis of these samples.
  • Comparison of findings with literature descriptions of superficial BCC.

Main Results:

  • The histological and immunohistochemical profiles of BCH overlying DFs showed significant similarities to superficial BCC.
  • These similarities challenge clear differentiation based on current standard techniques.

Conclusions:

  • Current histological and immunohistochemical methods may not be sufficient to reliably differentiate BCH overlying DFs from superficial BCC.
  • Innovative diagnostic approaches, potentially including molecular techniques, are needed to improve diagnostic accuracy.