Breast cancer is a malignant tumor that starts in the cells of the breast. It can occur in both men and women, although it is more common in women. The tumor can spread to other parts of the body through the lymphatic system or bloodstream, leading to potentially life-threatening complications. The development of breast cancer is often influenced by genetic factors, hormonal imbalances, and environmental exposures. Early detection through regular screenings and self-examinations is crucial for successful treatment and improved outcomes. Symptoms of breast cancer may include a lump or thickening in the breast or underarm area, changes in the size or shape of the breast, nipple discharge, or skin changes such as redness or dimpling. Diagnosis typically involves a combination of imaging tests, such as mammograms and ultrasounds, and tissue biopsies. Treatment options for breast cancer may include surgery, radiation therapy, chemotherapy, hormone therapy, or targeted therapy. The choice of treatment depends on the stage of the cancer, the presence of specific genetic mutations, and the overall health of the patient. It is important for individuals to work closely with their healthcare team to develop a personalized treatment plan that addresses their unique needs and preferences.