Systemic diseases affecting the breast: Imaging, diagnosis, and management.

Various systemic diseases of benign or malignant etiologies can clinically manifest in the breast. Some imaging findings of breast lesions can be pathognomonic for a given condition, while others are non-specific, mimicking primary breast carcinoma and requiring tissue biopsy for definitive diagnosis. In addition to obtaining a detailed clinical history, radiologists should be familiar with the diverse clinical and imaging characteristics of these conditions to help exclude primary breast cancer and avoid unnecessary interventions. This review aims to discuss the clinical presentations, imaging features, pathologic findings, and management of systemic conditions that may affect the breast.