It's natural to worry if a doctor finds a breast lesion. But lesions and other breast problems that aren't cancerous are actually very common.
Breast-lesions characterization using Quantitative Ultrasound
Breast masses Notes: Diagrams & Illustrations
Inflammatory Breast Cancer: Symptoms, Diagnosis, Treatment
Staging & Grade - Breast Pathology
Benign breast disease types - Mayo Clinic Health System
Breast Health: Follow-up after an abnormal mammogram - NCI
Breast Cancer Signs, Symptoms and Understanding an Imaging Report
Etiology and Management of Benign Breast Disease - ScienceDirect
Understanding Breast Lesions: Types, Causes & Treatment Options
Atlas of breast cancer early detection
Breast infections (mastitis): Symptoms, causes, types, and treatment
Types of Breast Cancer - Breast Pathology
Benign Breast Disease in Women - Endotext - NCBI Bookshelf