GREAT! Dr. clearly explains what happens with cancer

Video: Explains what cancer does and how harmful they are to everyone.

Dr. Edgar D. Staren explains how cancer cells work inside the body. He also explains how many people get cancer in the world. He also tells you how to treat it to slow the process.

Even as American women embraced mammography, researchers’ understanding of breast cancer — including the role of early detection — was shifting. The disease, it has become clear, does not always behave in a uniform way. It’s not even one disease. There are at least four genetically distinct breast cancers. They may have different causes and definitely respond differently to treatment. Two related subtypes, luminal A and luminal B, involve tumors that feed on estrogen; they may respond to a five-year course of pills like tamoxifen or aromatase inhibitors, which block cells’ access to that hormone or reduce its levels. In addition, a third type of cancer, called HER2-positive, produces too much of a protein called human epidermal growth factor receptor 2; it may be treatable with a targeted immunotherapy called Herceptin.

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