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- W2094846142 abstract "In the clinical diagnosis of breast cancer, immunohistochemistry panels with estrogen receptor (ER), progesterone receptor (PgR), human epidermal growth factor receptor 2 (HER2) and Ki-67 are routinely used, and they have been proposed for the classification of breast tumors into distinct subtypes. Gene expression analysis with formalin-fixed paraffin-embedded material have also become widely available recently, but the prognostic values of corresponding gene panels compared with these four immunohistochemical panels had never tested. We independently evaluated the 5-year relapse risk-estimation scores using semiquantitative data of four immunohistochemical panels (Ku-IHC4 score) and compared these with the results of four-gene expression profiling of formalin-fixed paraffin-embedded specimens (Ku-FFPE4 score) in a consecutive series of 235 primary invasive breast cancer patients. Ku-IHC4 score was revealed to be an independent predictor of recurrence other than Ku-FFPE4 score in a multivariate model analyzed by classical clinical parameters (Ku-IHC4 score vs Ku-FFPE4 score; χ(2): 14.2 vs 2.5, P: 0.0002 vs 0.11). When patients were trichotomized into high-, intermediate- and low-risk groups using the thresholds determined from the approximately calculated 5-year relapse rate, Kaplan-Meier analyses showed a significant difference among the three groups in Ku-IHC4 score (log-rank, P<0.0001), but not in Ku-FFPE4 score. The high-risk group according to Ku-FFPE4 score showed contradictory low recurrence rates (Ku-IHC4 score vs Ku-FFPE4 score, 53.1 vs 24.8%), which might be caused by risk-dependently extended error ranges. We show that the Ku-IHC4 score, consisted with semiquantitative measures of immunohistochemistry, provides better prognostic information than the corresponding quantitative RNA measurements. Prognostication tools such as the Ku-IHC4 score may be potentially useful in screening which patients had better be assessed by further testing using other genes rather than ER, PgR, HER2 and Ki-67 to determine critical aspects of therapeutic decision making." @default.
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- W2094846142 date "2013-01-01" @default.
- W2094846142 modified "2023-09-30" @default.
- W2094846142 title "Comparison of prognostic values between combined immunohistochemical score of estrogen receptor, progesterone receptor, human epidermal growth factor receptor 2, Ki-67 and the corresponding gene expression score in breast cancer" @default.
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- W2094846142 doi "https://doi.org/10.1038/modpathol.2012.151" @default.
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