This document discusses early breast cancer and its management. Early breast cancer includes in situ breast cancer and stages I and IIA breast cancers. The aims of treatment are possible cure, controlling local disease in the breast and axilla, breast conservation, preventing distant metastasis, and preventing local recurrence. Treatment may involve lumpectomy, lymph node assessment, and adjuvant radiation and/or chemotherapy. For a 40-year-old woman with early breast cancer, treatment would involve investigations like blood tests and imaging, followed by lumpectomy, sentinel lymph node biopsy or axillary dissection, and radiation or chemotherapy depending on risk factors. Breast conservation therapy is preferred when possible.