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- W2314458267 abstract "Purpose: The Her2/neu gene is amplified and/or its protein is overexpressed in 15-25% of invasive breast cancer, but in Ductal Carcinoma In Situ (DCIS) this expression is highly increased (60-80%). We review our rate of DCIS with Her2 amplified in a prospective series of women with new diagnosis of DCIS. Methods: Patients with new diagnosis of DCIS by biopsy were studied. The status of Her2 was evaluated by fluorescence in situ hybridization (Vysis path vision HER-2 DNA probe kit) and was considered amplified if the ratio HER2/CEP17 was >2.0. The status of estrogen and progesterone receptors were analyzed by inmunohistochemistry (IHQ). Data evaluating architectural pattern and histological grade were also collected. Results: Data from 53 patients with DCIS were included (two patients with combined invasive ductal carcinoma detected at time of surgery and 51 cases of pure DCIS). HER2 was amplified in 20 patients (37%), with HER2/CEP17 ratios between 2.16 to 14.00. A total of 29 patients had grade III DCIS, and of those 18 (62%) had Her2 amplified. 17 patients (32%) were estrogen and progesterone receptors negative (10 with Her2 amplified). We have not observed any correlation about architectural pattern (comedo, cribriform, micropapillary, solid/necrotic) and amplification of Her2. Conclusion: In our series of DCIS patients the Her2 amplification was less commonly found compared to prior studies (37% vs >60%). Most of DCIS were grade 3 (90%) and no relation was found among the architectural pattern and amplification of Her2. Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P1-15-06." @default.
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- W2314458267 date "2010-12-15" @default.
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- W2314458267 title "Abstract P1-15-06: Incidence of HER2 Positive Quantified by FISH in Ductal Breast Carcinoma In Situ" @default.
- W2314458267 doi "https://doi.org/10.1158/0008-5472.sabcs10-p1-15-06" @default.
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