Surviving-Cancers.com

Breast cancer self-examination

A year ago I reported on findings which indicated that bisphosphonate drugs might be a contributor to esophageal cancer. Now I have to report new research which indicates that bisphosphonate drugs such as Fosamax may be effective in reducing the risk of breast cancer.

Two different studies have come up with similar results, one resulting from the Woman’s Health Initiative (WHI) and another from a controlled case study in Israel. Both showed a sharply lowered cancer incidence in women who had been prescribed bisphosphonates to prevent bone loss.

The WHI study was led by Dr, Rowan Chlebowski, chief oncologist from the Los Angeles Biomedical Research Institute at the Harbor-UCLA Medical Center.

Of the 2816 women having taken bisphosphonates at the beginning of the WHI study, only 64 women developed breast cancer. This was a 32 percent reduction in incidence compared to those women who were not taking the drug.

It should be noted that women taking the drugs were slightly more likely to develop DCIS, or ductal carcinoma in situ, than those who did not. DCIS is a very early form of breast cancer confined to the milk ducts where it is formed and is nearly 100 percent curable when found.

The other study, led by Dr. Gad Rennert, chairman of community medicine and epidemiology at the Clalit National Cancer Control Center in Haifa Israel looked at 4575 women who took bisphosphonates for at least a year. The results indicated a 34 percent reduced rate of breast cancer diagnosis. Even after controlling for other risk factors, the reduction remained at 29 percent.

Where tumors did occur in the women who took the drugs, the tumors were more estrogen-receptor positive and differentiated. These factors are associated with better response to treatment and better prognoses.

Breast cancer ribbon

The study found that protection from the drug was most pronounced after taking it for a year. Less than a year offered little or no protective benefit and after more than a year, the benefit did not increase.

Over 30 million patients are prescribed bisphosphonates for the reduction of osteoporosis.

So there you have it. If you take bisphosphonates you may increase the risk of developing esophageal cancer, and your risk of developing breast cancer may increase if you don’t.