BBD (benign breast disease)
SBBD (simple or homogeneous benign breast disease): Only one BBD lesion is present
HBBD (heterogeneous benign breast disease): Multiple BBD lesions of different pathologic diagnoses
SL-HBBD (Single-level HBBD): Multiple BBD lesions within a single risk level
ML-HBBD (Multi-level HBBD): Multiple BBD lesions with different risk levels
NPL: Non-proliferative lesions
PLWA: Proliferative lesions without atypia
PLA: Proliferative lesions with atypia