I had a double mastectomy so there hasn't been a cancer in the same spot. My 2nd diagnosis was breast cancer metastasized to the bones. Breast cancer can spread to other parts of the body and be the same cancer as the original diagnosis - it's not always a secondary cancer. For example, the cancer that is in my bones is the original breast cancer that I had, not a bone cancer, just cancer spread to the bones. That same cancer has the possibility of spreading to there parts of my body, such as the lungs, liver, etc but wouldn't be labeled as lung cancer or liver cancer; it would still be breast cancer that had spread. That's not to say different kinds of cancer can't develop in other areas. I hope this helps.