Breast MRI increases the number of mastectomies for ductal cancers, but decreases them for lobular cancers

In this retrospective population-based cohort study, we analyzed breast MRI use and its impact on type of surgery, surgical margin involvement, and the diagnosis of contralateral breast cancer. All Dutch patients with cT1–4N0–3M0 breast cancer diagnosed in 2011–2013 and treated with primary surgery were eligible for inclusion. Using multivariable analyses, we analyzed in different categories whether MRI use was related to surgery type, margin...