1.   Lobular tumors form in clusters of milk-producing cells, unlike most breast cancers, which grow in the ducts that carry milk.

2.   No tumors ever formed, as Lane points out in his book.

3.   Other scientists have questioned that assertion, and countered that tumors might still form in people by some other mechanism.

4.   Scientists continue to learn more about how tumors form and grow, providing new ways to attack the disease.

5.   The dominant tumors formed bulging masses, while on the opposite hip the cancer growth was tiny, with almost no blood vessels.

6.   When tumors do form, cells in the center of the growth are deprived of oxygen.