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Cutaneous lymphadenoma.

H S Inalöz1, M M Chowdhury, A G Knight

  • 1Department of Dermatology, University of Wales College of Medicine, Cardiff, UK. serhatinaloz@hotmail.com

Journal of the European Academy of Dermatology and Venereology : JEADV
|January 5, 2002
PubMed
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This study details two cases of benign cutaneous lymphadenoma (CL), a rare biphasic tumor. Findings suggest CL may represent a variant of basal cell carcinoma (BCC) or trichoepithelioma with significant T-cell and dendritic cell infiltration.

Area of Science:

  • Dermatopathology
  • Oncology
  • Immunohistochemistry

Background:

  • Lymphoepithelial neoplasms are biphasic tumors characterized by epithelial and lymphoid components.
  • This group includes benign cutaneous lymphadenoma (CL), malignant lymphoepithelioma-like carcinoma, and dermal thymus.
  • Cutaneous lymphadenoma (CL) is a rare benign neoplasm.

Observation:

  • Two cases of CL in male patients (14 and 64 years old) are presented.
  • The older patient had a history of basal cell carcinomas (BCCs) and solar keratoses.
  • Histological examination revealed invasive, non-ulcerated tumors with a mixed architecture resembling BCC and trichoepithelioma.

Findings:

  • Immunocytochemistry confirmed a biphasic epithelial tumor of follicular differentiation.

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  • The tumor is possibly a variant of trichoepithelioma or BCC.
  • Epithelial islands showed heavy infiltration by CD3-positive T cells and S-100-positive dendritic cells.

    • Implications:

    • These findings contribute to understanding the heterogeneous nature of lymphoepithelial neoplasms.
    • Clarifies the potential relationship between CL, BCC, and trichoepithelioma.
    • Highlights the importance of immunocytochemistry in diagnosing biphasic tumors.