Objectives. Knowledge of HER-2/neU status is mandatory to identify breast cancer patients amenable to trastuzumab treatment. We evaluated the diagnostic performance of quantitative real-time polymerase chain reaction (qRT-PCR) in the preoperative determination of HER-2/neU Status in breast cancer, using core biopsy material. Methods. In a prospective series, qRT-PCR was performed on fresh core biopsy specimens taken preoperatively in 87 patients with breast carcinoma. Cases with qRT-PCR ratio 2.0 were considered to have HER-2/neu amplification. The results of RT-PCR analysis were compared with those of the standard immunohistochemistry (IHC) and Fluorescence in situ hybridization (FISH) methods. Cases with IHC 3+ or with IHC 2+ and FISH showing amplification were considered HER-2/neu positive. All other cases were considered HER-2/neu negative. Results. qRT-PCR showed HER-2/neU amplification in 13 cases (14.9%), while the standard IHC-FISH combined approach identified 17 HER-2/neu-positive cases (19.5%). Overall, there was concordance between methods in 83 of 87 patients (95.4%). The Spearman's rho correlation coefficient was 0.851; p<0.001. The diagnostic performance for preoperative diagnosis of HER-2/neu status using RT-PCR on core biopsy specimens as compared to standard approach was as follows: sensitivity 76.5%: specificity 100%; positive predictive value 100%: negative predictive value 94.6%. Conclusions. Quantitative RT-PCR determination of HER-2/neu Status from core biopsy specimens provided results comparable to those given by the standard IHC and FISH methods. The Use of qRT-PCR on core biopsy material may represent a very useful and easy tool to enhance early identification of HER-2/neu-positive breast cancer patients who, possibly can benefit from trastuzumab treatment. (C) 2009 Elsevier Inc. All rights reserved.

Preoperative assessment of HER-2/neu status in breast carcinoma: The role of quantitative real-time PCR on core-biopsy specimens / T. Susini;C. Bussani;G. Marini;J. Nori;S. Olivieri;C. Molino;S. Bianchi;V. Vezzosi;M. Paglierani;M. Giachi;E. Borrani;G. Scarselli. - In: GYNECOLOGIC ONCOLOGY. - ISSN 0090-8258. - STAMPA. - 116:(2010), pp. 234-239. [10.1016/j.ygyno.2009.10.067]

Preoperative assessment of HER-2/neu status in breast carcinoma: The role of quantitative real-time PCR on core-biopsy specimens

SUSINI, TOMMASO;BUSSANI, CECILIA;OLIVIERI, SIMONE;MOLINO, CECILIA;BIANCHI, SIMONETTA;VEZZOSI, VANIA;GIACHI, MASSIMO;BORRANI, ELENA;SCARSELLI, GIANFRANCO
2010

Abstract

Objectives. Knowledge of HER-2/neU status is mandatory to identify breast cancer patients amenable to trastuzumab treatment. We evaluated the diagnostic performance of quantitative real-time polymerase chain reaction (qRT-PCR) in the preoperative determination of HER-2/neU Status in breast cancer, using core biopsy material. Methods. In a prospective series, qRT-PCR was performed on fresh core biopsy specimens taken preoperatively in 87 patients with breast carcinoma. Cases with qRT-PCR ratio 2.0 were considered to have HER-2/neu amplification. The results of RT-PCR analysis were compared with those of the standard immunohistochemistry (IHC) and Fluorescence in situ hybridization (FISH) methods. Cases with IHC 3+ or with IHC 2+ and FISH showing amplification were considered HER-2/neu positive. All other cases were considered HER-2/neu negative. Results. qRT-PCR showed HER-2/neU amplification in 13 cases (14.9%), while the standard IHC-FISH combined approach identified 17 HER-2/neu-positive cases (19.5%). Overall, there was concordance between methods in 83 of 87 patients (95.4%). The Spearman's rho correlation coefficient was 0.851; p<0.001. The diagnostic performance for preoperative diagnosis of HER-2/neu status using RT-PCR on core biopsy specimens as compared to standard approach was as follows: sensitivity 76.5%: specificity 100%; positive predictive value 100%: negative predictive value 94.6%. Conclusions. Quantitative RT-PCR determination of HER-2/neu Status from core biopsy specimens provided results comparable to those given by the standard IHC and FISH methods. The Use of qRT-PCR on core biopsy material may represent a very useful and easy tool to enhance early identification of HER-2/neu-positive breast cancer patients who, possibly can benefit from trastuzumab treatment. (C) 2009 Elsevier Inc. All rights reserved.
2010
116
234
239
T. Susini;C. Bussani;G. Marini;J. Nori;S. Olivieri;C. Molino;S. Bianchi;V. Vezzosi;M. Paglierani;M. Giachi;E. Borrani;G. Scarselli...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/394675
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