What is the medical definition of breast cancer? (brest KAN-ser) Cancer that forms in tissues of the breast.
What is breast cancer and its types? Invasive breast cancer (ILC or IDC)
Invasive (or infiltrating) breast cancer has spread into surrounding breast tissue. The most common types are invasive ductal carcinoma and invasive lobular carcinoma. Invasive ductal carcinoma makes up about 70-80% of all breast cancers.
What is early breast cancer definition? Early breast cancer is when cancer is found only in the breast or nearby lymph nodes, and has not spread to other parts of the body. There are different subtypes of breast cancer, based on whether hormone receptors, such as estrogen receptors, or other proteins are involved in how the cancer divides and grows.
What exactly cause breast cancer? Breast cancer develops as a result of genetic mutations or damage to DNA. These can be associated with exposure to estrogen, inherited genetic defects, or inherited genes that can cause cancer, such as the BRCA1 and BRCA2 genes. When a person is healthy, their immune system attacks any abnormal DNA or growths.