A Comprehensive Review of Breast Cancer: Classification, Stages, Risk Factors, And Diagnostic Method

Breast cancer is a leading health concern globally and the second highest cause of cancer-related deaths among women. Though predominantly found in women, it can also affect men, albeit infrequently. Its progression involves complex, multi-step processes that make prevention and treatment a significant challenge. The disease is characterized by its potential to spread aggressively to distant organs such as the liver, lungs, brain, and bones, complicating management and reducing survival rates in advanced stages. The classification of breast cancer spans stages 0 to 4, reflecting the size, type, and extent of tumor spread. Non-invasive tumors fall under stage 0, while stage 4 represents advanced, metastatic disease. Several risk factors contribute to its occurrence, including age, hormonal changes, genetics, lifestyle choices, and environmental exposures. Genetic mutations like BRCA1 and BRCA2, late menopause, lack of physical activity, alcohol consumption, and exposure to radiation significantly increase susceptibility to breast cancer. Early diagnosis has improved significantly due to advances in imaging technologies, such as mammography, MRI, and PET scans, alongside molecular diagnostic tools like biomarker identification and gene sequencing. Despite these developments, breast cancer’s diversity and complexity demand personalized treatment approaches and a deeper understanding of its underlying mechanisms. Enhancing preventive strategies and refining diagnostic methods are essential for reducing its global impact and improving patient outcomes.