Breast cancer is a type of cancer that forms in the cells of the breast. It can occur in both women and men, but it is much more common in women. The disease often starts in the ducts that carry milk to the nipple or in the lobules that produce milk. Early detection through mammograms and self-exams can significantly improve treatment outcomes. Symptoms of breast cancer may include a lump in the breast, changes in breast shape or size, and unusual discharge from the nipple. Treatment options vary and may include surgery, radiation therapy, and chemotherapy. Regular check-ups and awareness of changes in the breast are essential for early diagnosis.