What is invasive breast cancer and how is it treated? what is the general survival rate?

Breast ca: Invasive refers to the tumor cells invading through the originating structure [usually the milk duct in breast cancer] and developing the ability to attract more blood supply and grow bigger. It also means it can spread to other parts of body. From am ca society: 2001-2002 stage & 5-year survival rate: 0-93%; i-88%; iia- 81%; iib- 74%; iiia- 67%; iiib- 41%*; iiic; 49%*; iv- 15%;.

See comment: Invasive cancer: malignant cells have penetrated into the surrouding cells and are at risk for metastases. In situ (dcis) is a condition where malignant appearing cells do not have that penetration - and have little or no risk of metastases. Invasive breast cancer requires lumpectomy (with radiation) or mastectomy. Most patients receive some sort of whole body treatment: chemo or hormonal block.