How long can it take for a breast tumor to form?

Varies: It varies by individuals. There are some tumors that grow very slowly that tend to metastasize later in their progression. And there are other tumors that grow very rapidly and metastasize at an earlier period.

Varies: Each cancer is unique. Some cancer cells have the ability to metastasize very early in their development while other can be slower to metastasize.

Varies: Each cancer is unique. Some cancers are slower to form and do not metastasize until they are larger. While other tumors grow very rapidly and metastasize at a much early period.