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Negative HER2/neu Amplification Using Immunohistochemistry and Chromogenic in Situ Hybridization Techniques in Skin Melanoma Cases

  • Shayanfar, Nasrin (Oncopathology Research Center, Iran University of Medical Sciences) ;
  • Bahari, Leila (Department of Pathology, Iran University of Medical Sciences) ;
  • Safaie-Naraghi, Zahra (Department of Pathology, Razi Hospital, Tehran University of Medical Sciences) ;
  • Kamyab, Kambiz (Department of Pathology, Razi Hospital, Tehran University of Medical Sciences) ;
  • Gheytanchi, Elmira (Oncopathology Research Center, Iran University of Medical Sciences) ;
  • Rezaei, Nima (Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences)
  • Published : 2015.02.25

Abstract

Background: This study was performed to evaluate the amplification of HER-2/neu in patients with melanoma. Materials and Methods: Amplification of HER-2/neu was evaluated in a group of patients with melanoma, referred to two referral centers in Tehran, using immunohistochemistry (IHC) and chromogenic in situ hybridization (CISH) techniques. Results: Forty patients with mean age $57.9{\pm}19.5years$ were enrolled in this study. The most frequent type of melanoma was acral, while lower limbs were the most frequent sites. The amplification of HER2/neu was negative in 97.5% of patients with IHC and in 100% of patients with CISH technique. Only one case (2.5%) shows weak positive staining (+2) in IHC method. Fifty five percent of melanoma was ulcerative, and the most common stages of tumors were stages 4b and 3b. More than 47% of cases were in Clark level III, while the mean of Breslow thickness was $3.56{\pm}2.87mm$. The stage of the case that showed weakly positive staining (2+) in IHC was 4b. Conclusions: The amplification of HER2/neu biomarker was negative in patients with melanoma, using both CISH and IHC techniques.

Keywords

References

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