1. Invasive breast cancer recurrence was significantly reduced with extended aromatase inhibitor therapy. 2. No significant reduction was noted for breast cancer-specific mortality. Evidence Rating Level: 1 (Excellent) Study Rundown: In postmenopausal women with estrogen receptor–positive breast cancer, 5 years of tamoxifen significantly reduces long-term recurrence and mortality. Aromatase inhibitors (AIs) have shown additional efficacy […]