Solid occupying breast lesions are imaging terms that include benign and malignant lesions. A solid breast lesion is a nodule or mass in the breast that can be distinguished from a cystic nodule on ultrasound or MRI. Most benign nodules are hyperplastic nodules, fibroadenomas and mastitis, while most malignant nodules are breast cancer. Fibroadenoma of the breast can have potentially malignant manifestations. If the nodes have clear margins and uniform texture, they tend to be benign nodules. If the edges are irregular, burr-like changes, uneven density or adhesions in the surrounding tissues with obvious fine sand-like calcifications, further puncture examination is needed and the nature is more inclined to malignancy. Three common nodules are treated as follows: 1. hyperplastic nodules, which can be closely observed and the possibility of its carcinogenesis is very small, about 1%, by reviewing ultrasound and MRI; 2. fibroadenomas, smaller ones regular observation; 3, breast cancer, immediate surgery.