Ontology type: schema:ScholarlyArticle
2017-04
AUTHORSAlexandre de Nonneville, Anthony Gonçalves, Christophe Zemmour, Jean M. Classe, Monique Cohen, Eric Lambaudie, Fabien Reyal, Christophe Scherer, Xavier Muracciole, Pierre E. Colombo, Sylvia Giard, Roman Rouzier, Richard Villet, Nicolas Chopin, Emile Darai, Jean R. Garbay, Pierre Gimbergues, Laura Sabiani, Charles Coutant, Renaud Sabatier, François Bertucci, Jean M. Boher, Gilles Houvenaeghel
ABSTRACTPURPOSE: Benefit of adjuvant trastuzumab-based chemotherapy for node-positive and/or >1 cm human epidermal growth factor receptor 2-positive (HER2+) breast carcinomas has been clearly demonstrated in randomized clinical trials. Yet, evidence that adjuvant chemotherapy with or without trastuzumab is effective in pT1abN0 HER2+ tumors is still limited. The primary objective of this study was to investigate the impact of adjuvant chemotherapy ± trastuzumab on outcome in this subpopulation. PATIENTS AND METHODS: A total of 356 cases of pT1abN0M0 HER2 + breast cancers were retrospectively identified from a large cohort of 22,334 patients, including 1248 HER2+ patients who underwent primary surgery at 17 French centers, between December 1994 and January 2014. The primary end point was disease-free survival (DFS). A multivariate Cox model was built, including adjuvant chemotherapy, tumor size, hormone receptor status, and Scarff Bloom Richardson (SBR) grade. RESULTS: A total of 138 cases (39%) were treated with trastuzumab-based chemotherapy, 29 (8%) with chemotherapy alone, and 189 (53%) received neither trastuzumab nor chemotherapy. Adjuvant chemotherapy ± trastuzumab was associated with a significant DFS benefit (3-year 99 vs. 90%, and 5-year 96 vs. 84%, Hazard ratio, HR 0.26 [0.10-0.67]; p = 0.003, logrank test) which was maintained in multivariate analysis (HR 0.19 [0.07-0.52]; p = 0.001). Metastasis-free survival was also increased (HR 0.25 [0.07-0.86]; p = 0.018, logrank test) at 3-year (99 vs. 95%) and 5-year (98 vs. 89%) censoring. Exploratory subgroup analysis found DFS benefit to be significant in hormone receptor-negative, hormone receptor-positive, and pT1b tumors, but not in pT1a tumors. CONCLUSIONS: Adjuvant chemotherapy ± trastuzumab is associated with a significantly reduced risk of recurrence in subcentimeter node-negative HER2+ breast cancers. Most of the benefit may be driven by pT1b tumors. More... »
PAGES307-316
http://scigraph.springernature.com/pub.10.1007/s10549-017-4136-5
DOIhttp://dx.doi.org/10.1007/s10549-017-4136-5
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PUBMEDhttps://www.ncbi.nlm.nih.gov/pubmed/28155054
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"description": "PURPOSE: Benefit of adjuvant trastuzumab-based chemotherapy for node-positive and/or >1\u00a0cm human epidermal growth factor receptor 2-positive (HER2+) breast carcinomas has been clearly demonstrated in randomized clinical trials. Yet, evidence that adjuvant chemotherapy with or without trastuzumab is effective in pT1abN0 HER2+ tumors is still limited. The primary objective of this study was to investigate the impact of adjuvant chemotherapy\u00a0\u00b1\u00a0trastuzumab on outcome in this subpopulation.\nPATIENTS AND METHODS: A total of 356 cases of pT1abN0M0 HER2\u00a0+\u00a0breast cancers were retrospectively identified from a large cohort of 22,334 patients, including 1248 HER2+ patients who underwent primary surgery at 17 French centers, between December 1994 and January 2014. The primary end point was disease-free survival (DFS). A multivariate Cox model was built, including adjuvant chemotherapy, tumor size, hormone receptor status, and Scarff Bloom Richardson (SBR) grade.\nRESULTS: A total of 138 cases (39%) were treated with trastuzumab-based chemotherapy, 29 (8%) with chemotherapy alone, and 189 (53%) received neither trastuzumab nor chemotherapy. Adjuvant chemotherapy\u00a0\u00b1\u00a0trastuzumab was associated with a significant DFS benefit (3-year 99 vs. 90%, and 5-year 96 vs. 84%, Hazard ratio, HR 0.26 [0.10-0.67]; p\u00a0=\u00a00.003, logrank test) which was maintained in multivariate analysis (HR 0.19 [0.07-0.52]; p\u00a0=\u00a00.001). Metastasis-free survival was also increased (HR\u00a00.25 [0.07-0.86]; p\u00a0=\u00a00.018, logrank test) at 3-year (99 vs. 95%) and 5-year (98 vs. 89%) censoring. Exploratory subgroup analysis found DFS benefit to be significant in hormone receptor-negative, hormone receptor-positive, and pT1b tumors, but not in pT1a tumors.\nCONCLUSIONS: Adjuvant chemotherapy\u00a0\u00b1\u00a0trastuzumab is associated with a significantly reduced risk of recurrence in subcentimeter node-negative HER2+ breast cancers. Most of the benefit may be driven by pT1b tumors.",
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