Concordance Between Immunohistochemistry (IHC) and Silver Situ Hybridization (SISH) in Endometrial Carcinoma Diagnosis: Using HER-2/neu

Osman Mohammed Elmahi and Hisham Ali Waggiallah

Background and Objective: Human epidermal growth factor receptor 2 (Her-2/neu) has been demonstrated as biomarker in Endometrial Carcinoma (EC). This study was conducted to assess the concordance between Sudanese women between immunohistochemistry (IHC) and Silver Situ Hybridization (SISH) for EC diagnosis using HER-2/neu. Materials and Methods: This was a retrospective cross sectional study performed in the state of Khartoum, Sudan. This research used eighty-eight samples of embedded blocks of formalin fixed paraffin referred to the histopathology lab from 2007-2013. The technique of tissue microarray (TMA) was used in which paraffin blocks were prepared before IHC and SISH were subjected. Results: In this analysis, 88 specimens were previously diagnosed as endometrial adenocarcinoma. The number of Her-2/new oncogene positive cases among Sudanese women by using IHC were (15.9%), however Her-2/neu amplification in EC were 11.5% by using SISH analysis and strong correlation between Her-2/neu IHC and Her-2/neu SISH is existed, since p-value is 0.,000. Conclusion: SISH is a reliable technique that can be used for detecting Her-2/neu oncoprotein and it has many advantages over other methods, also SISH can be used as an alternative to FISH technique.

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