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Prognostic significance of Ep-CAM AND Her-2/neu overexpression in invasive breast cancer

✍ Scribed by Gilbert Spizzo; Peter Obrist; Christian Ensinger; Igor Theurl; Martina Dünser; Angela Ramoni; Eberhard Gunsilius; Günther Eibl; Gregor Mikuz; Günther Gastl

Publisher
John Wiley and Sons
Year
2002
Tongue
French
Weight
683 KB
Volume
98
Category
Article
ISSN
0020-7136

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✦ Synopsis

Abstract

To assess the frequency and prognostic impact of Ep‐CAM and Her‐2/neu overexpression in patients with breast cancer and to determine its relationship with other prognostic markers, 205 breast cancer patients with a median follow‐up of 10.8 years were enrolled in this retrospective study. Overexpression of Ep‐CAM and Her‐2/neu in tumor tissue samples was assessed by immunohistochemistry. Tumors presenting a Her‐2/neu 2+ staining were additionally analyzed by FISH to exclude false positive results. Ep‐CAM and Her‐2/neu overexpression was found in 35.6% and 19.5% of the tumor samples, respectively. Both Ep‐CAM and Her‐2/neu overexpression were predictive for poor disease‐free (DFS) and disease‐related overall survival (DROS). Concurrent Ep‐CAM and Her‐2/neu overexpression was present in 13.2% of tumor specimens and had an additive negative impact on DFS and DROS. This minority of patients had a median time to relapse of only 34 months, whereas the median time to relapse was not reached in the patient population without Her‐2/neu and Ep‐CAM overexpression. By multivariate analysis Ep‐CAM overexpression proved to be an indicator of poor prognosis, independent of tumor size, histologic grade, hormone receptor expression and Her‐2/neu overexpression. In conclusion, overexpression of Ep‐CAM and Her‐2/neu complement each other as predictors for poor prognosis in patients with invasive breast cancer. Determination of these tumor markers should help in assigning breast cancer patients to 1 of 3 distinct risk categories. © 2002 Wiley‐Liss, Inc.

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