Metastatic cancer is a cancer that has spread from its primary site (the part of the body in which it developed) to other parts of the body. If cells break away from a cancerous tumor, they can travel to other areas of the body. There, they may settle and form "colony" tumors. In their new location, the cancer cells continue growing. The spread of a tumor to a new part of the body is called metastasis.
Information on Cancer found HERE
So it wouldn't necessarily be breast cancer so much as cancer in the breast, but according to this article, Yes. It is entirely possible.
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Wizard's Third Rule: Passion Rules Reason.
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