Fluorescence in situ hybridization and immunohistochemistry for detecting HER-2 gene amplification and protein expression in breast cancer tissue / 重庆医学

ABSTRACT

Objective To analyze and compare the fluorescence in situ hybridization(FISH) and immunohistochemical(IHC) for detecting HER-2 gene amplification and protein expression in breast cancer tissues .Methods 110 cases of breast cancer from Janu-ary 2008 to May 2012 receiving the modified radical mastectomy were selected .The resected breast cancer tissue was detected by FISH and IHC and the detected results were performed the comparative analysis .Results Among 110 cases of breast cancer tissue , 25 cases(22 .73% ) were the HER-2 protein expression(+ + + ) ,44 cases(40 .00% ) were(+ + ) ,26 cases(23 .64% ) were(+ ) and 15 cases(13 .64% ) were(-) .Among 110 cases ,the gene amplification was in 28 cases(25 .45% ) and no gene amplification was in 82 cases(74 .55% ) .The positive(+ + + ) of the IHC detection was coincident with that of FISH ,and the negative(+ /-) of the IHC detection was also coincident with that of FISH ,there was statistical difference between the suspicious positive of the IHC de-tection and the results of FISH (P<0 .05) .But the total coincidence of the IHC detection results and FISH test results was 89 .29%(25/28) ,and the two detection methods had the positive correlation (χ2 =84 .89 ,P<0 .01) .Conclusion The positive and negative expression of the IHC detection has better consistency with that of the FISH detection .However ,the coincidence of the IHC suspi-cious positive expression and the FISH results is poor ,indicating that the suspicious positive sample of the IHC detection needs to be detected by the FISH detection .