MRI Evaluation of the Lactating Breast

Purpose of Review To review the MRI appearance of physiologic lactational changes, common benign pathologies, and malignancies in the lactating breast. Recent Findings The prevalence of pregnancy-associated breast cancer has increased as more women delay childbirth and lactation. There is a transient increase in breast cancer risk after delivery when women may be lactating. MRI is more sensitive than mammography and ultrasound for the evaluation of the extent of disease in lactating women. Summary Understanding the key MRI findings of benign and malignant pathologies in the lactating breast is critical for accurate diagnosis and prompt evaluation of pregnancy-associated breast cancer.