What is Breast Cancer?
The short answer to the question is – a tumor in the breast. In case of a non-invasive breast cancer, the tumor is localized and not spread from its origin of growth. This is referred to as “Carcinoma in Situ”. The tumor can be confined to the ducts (ductal carcinoma in situ) or confined to the lobules (lobular carcinoma in situ). “Duct” and “Lobules” refer to the milk duct and the milk producing glands respectively in the mammary glands. Most breast cancers start in the duct and spread to other tissues. Lobular cancer or carcinoma is not true cancer by itself, but has the potential to cause cancer later.