No significant differences in recurrence rates among women with DCIS taking anastrozole or tamoxifen

Postmenopausal women with ductal carcinoma in situ (DCIS) had similar outcomes with disease recurrence whether they took tamoxifen or the aromatase inhibitor anastrozole for five years after surgery, but women in the two groups had different side effects, according to results from the phase III IBIS-II DCIS clinical trial presented at the 2015 San Antonio Breast Cancer Symposium, held Dec. 8-12.