Chapter 6: Disorders of the Breasts

Benign breast disorders, including fibrocystic changes, fibroadenomas, and infectious mastitis, typically present as palpable masses, cyclical breast pain, or localized inflammation and are managed primarily through conservative approaches such as symptomatic relief, antimicrobial treatment, or surgical excision when clinically indicated. The chapter then transitions to the more complex landscape of breast malignancy, focusing on the cellular mechanisms driving uncontrolled epithelial proliferation and the predominant histological types of invasive disease. Systematic evaluation of malignant tumors requires comprehensive staging that integrates anatomical factors including primary tumor dimensions, regional lymph node involvement, and evidence of systemic dissemination to establish prognosis and guide treatment selection. Diagnostic methodology combines multiple imaging approaches—conventional mammography for screening and diagnostic purposes, advanced magnetic resonance techniques for enhanced tissue characterization, and tissue sampling via fine-needle aspiration cytology or stereotactic core needle biopsy to confirm histological diagnosis. Molecular and genetic analysis, particularly assessment of estrogen and progesterone receptor expression, evaluation of human epidermal growth factor receptor status, and testing for germline BRCA mutations, enables personalized treatment planning and identification of high-risk individuals within families. Therapeutic strategies employ multimodal approaches integrating localized interventions such as breast-conserving lumpectomy or extensive mastectomy procedures combined with adjuvant radiation, alongside systemic pharmacological treatments including chemotherapy regimens, hormonal modulation through receptor-targeted agents, and emerging immunotherapeutic approaches. The chapter emphasizes post-treatment considerations including prevention and management of lymphedema, nutritional optimization during recovery, and psychological support services essential for comprehensive patient care throughout the cancer trajectory.