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Licata, Luca; Viale, Giulia; Giuliano, Mario; Curigliano, Giuseppe; Chavez-MacGregor, Mariana; Foldi, Julia; Oke, Oluchi; Collins, Joseph; Del Mastro, Lucia; Puglisi, Fabio; Montemurro, Filippo; Vernieri, Claudio; Gerratana, Lorenzo; Giordano, Sara; Rognone, Alessia; Sica, Lorenzo; Gentilini, Oreste Davide; Cascinu, Stefano; Pusztai, Lajos; Giordano, Antonio; Criscitiello, Carmen; Bianchini, Giampaolo
NPJ breast cancer, 06/2023, Volume: 9, Issue: 1Journal Article
Adjuvant chemotherapy recommendations for ER+/HER2- early-stage breast cancers (eBC) involve integrating prognostic and predictive information which rely on physician judgment; this can lead to discordant recommendations. In this study we aim to evaluate whether Oncotype DX improves confidence and agreement among oncologists in adjuvant chemotherapy recommendations. We randomly select 30 patients with ER+/HER2- eBC and recurrence score (RS) available from an institutional database. We ask 16 breast oncologists with varying years of clinical practice in Italy and the US to provide recommendation for the addition of chemotherapy to endocrine therapy and their degree of confidence in the recommendation twice; first, based on clinicopathologic features only (pre-RS), and then with RS result (post-RS). Pre-RS, the average rate of chemotherapy recommendation is 50.8% and is higher among junior (62% vs 44%; p < 0.001), but similar by country. Oncologists are uncertain in 39% of cases and recommendations are discordant in 27% of cases (interobserver agreement K 0.47). Post-RS, 30% of physicians change recommendation, uncertainty in recommendation decreases to 5.6%, and discordance decreases to 7% (interobserver agreement K 0.85). Interpretation of clinicopathologic features alone to recommend adjuvant chemotherapy results in 1 out of 4 discordant recommendations and relatively high physician uncertainty. Oncotype DX results decrease discordancy to 1 out of 15, and reduce physician uncertainty. Genomic assay results reduce subjectivity in adjuvant chemotherapy recommendations for ER +/HER2- eBC.
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