Key clinical point: Women with ductal carcinoma in situ (DCIS) had a 3-fold increased risk of dying from breast cancer than women without DCIS.
Major finding: Among the cohort, 1,540 women with DCIS died of breast cancer. The expected number of deaths from breast cancer in the cancer-free cohort was 458.
Study details: Cohort study of 144,524 women diagnosed with DCIS from 1995 to 2014.
Disclosures: The authors report no conflicts of interest.
Source: Giannakeas, V, et al. JAMA Netw Open. 2020;3(9):e2017124. doi:10.1001/jamanetworkopen.2020.17124