Key clinical point: Exemestane plus ovarian function suppression (OFS) led to a greater reduction in recurrence risk than tamoxifen+OFS in premenopausal women with estrogen or progesterone receptor-positive (ER/PgR+) early breast cancer (BC).
Major finding: There was a significant improvement in 12-year disease-free survival (hazard ratio [HR] 0.79; P < .001) and distant recurrence-free interval (HR 0.83; P = .03) with exemestane+OFS vs tamoxifen+OFS, with overall survival outcomes (90.1% vs 89.1%) being excellent in both treatment arms.
Study details: Findings are from a combined analysis of the SOFT and TEXT trials including 4690 premenopausal women with ER/PgR+ early BC who were randomly assigned to receive OFS plus exemestane or tamoxifen.
Disclosures: The SOFT and TEXT are supported by ETOP IBCSG (European Thoracic Oncology Platform, International Breast Cancer Study Group) Partners Foundation, Switzerland. The authors declared serving as consultants or advisors or receiving honoraria, research funding, or travel and accommodation expenses from several sources.
Source: Pagani O, Walley BA, et al for the SOFT and TEXT Investigators and the International Breast Cancer Study Group (a division of ETOP IBCSG Partners Foundation). Adjuvant exemestane with ovarian suppression in premenopausal breast cancer: Long-term follow-up of the combined TEXT and SOFT trials. J Clin Oncol. 2022 (Dec 15). Doi: 10.1200/JCO.22.01064