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  11. The Markers Auxiliary In Distinguishing Between Nodal Nevi And Melanoma Metastases

The Markers Auxiliary in Distinguishing Between Nodal Nevi and Melanoma Metastases

Łukasz Kuźbicki1

  • 1Institute of Biology, Nicolaus Copernicus University in Toruń, Toruń, Poland.

Current Medicinal Chemistry
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Distinguishing nodal nevus (NN) from melanoma metastasis (MM) can be difficult. Immunohistochemical markers like PRAME and HMB-45 show promise in aiding diagnosis, though none are completely specific.

Area of Science:

  • Oncology
  • Pathology
  • Immunohistochemistry

Background:

  • Nodal nevus (NN) and melanoma metastasis (MM) have distinct clinical significance.
  • Distinguishing NN from MM in standard hematoxylin and eosin-stained specimens is often challenging.
  • Accurate differentiation is crucial for patient prognosis and treatment decisions.

Purpose of the Study:

  • To evaluate the diagnostic utility of various immunohistochemical markers for differentiating NN from MM.
  • To review and synthesize findings from existing studies on marker expression in NN and MM.

Main Methods:

  • A systematic review of 27 studies examining immunohistochemical marker expression.
  • Analysis of marker expression patterns (HMB-45, PRAME, p16, Ki-67, 5-hmC, Melan-A/Mart-1, S-100, SOX-10) in NN and MM.
Keywords:
Nodal nevusdiagnosishematoxylin and eosin stainingimmunohistochemistry.

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  • Comparison of marker frequencies and expression levels between NN and MM.

    • Main Results:

    • PRAME and HMB-45 staining were significantly higher in MM than NN.
    • p16 expression was lower in MM compared to NN.
    • Melan-A/Mart-1, S-100, and SOX-10 showed similar expression in both NN and MM.
    • PRAME demonstrated strong diagnostic potential but lacked complete specificity.
    • Ki-67 and 5-hmC showed slight but potentially significant differences.

    Conclusions:

    • Immunohistochemistry, particularly using PRAME, HMB-45, and p16, can aid in distinguishing NN from MM.
    • Ki-67 and 5-hmC may also offer diagnostic value.
    • Melan-A/Mart-1, S-100, and SOX-10 are not reliable for differentiating NN from MM.
    • No single marker is completely specific for melanocytes in this context.
    marker
    melanoma metastasis