31.   Tamoxifen inhibits the growth of breast tumors by blocking the hormone estrogen, which can stimulate cell growth.

32.   Studies in laboratory animals have also suggested that monounsaturated fat might lessen the incidence of breast tumors, and that polyunsaturates increase the incidence.

33.   The discovery that these genes, and presumably others, play a critical role in some breast tumors has opened a new avenue of attack.

34.   The vaccine targets a specific protein common in pre-malignant breast cancer tumors.

35.   They later found an enzyme in the tissues surrounding breast tumors that plays an important role in metastasis.

36.   This spring, researchers said the compound Taxotere showed remarkable ability to shrink advanced breast tumors.

37.   To most cancer doctors, a breast tumor is a poison that must be removed as quickly as possible.

38.   Two early breast tumors, not detected by any testing, were also found in the breast tissue removed from women who had chosen prophylactic mastectomy.

39.   Women with estrogen-sensitive breast cancer tumors often are given tamoxifen after surgery to reduce their risk of a recurrence of the disease.

40.   A pill that promises to help shrink advanced breast cancer tumors has received advanced approval from the U.S. government, its Swiss manufacturer said Friday.