Breast cancer

Breast cancer is a malignant tumor originating from the epithelial cells of the breast ducts or lobules. It commonly affects women aged 40-60, with a higher incidence around the perimenopausal period. Early symptoms often include breast lumps, nipple discharge, and enlarged axillary lymph nodes. In advanced stages, distant metastasis of cancer cells can lead to multi-organ involvement, directly threatening the patient's life.