Study of Bone Mineral Density in Postmenopausal Women After Treatment for Breast Cancer

Clinic visits twice during the first 2 years of the study with medical care directed by your treating doctor.BMD is measured by an X-ray test. The most common type of BMD testing is by energy x-ray absorptiometry (DEXA). Usually BMD is measured every other year, but to closely monitor women on this study, the BMD will be evaluated more often. The BMD will be measured 3 times (baseline, 12 months and 24 months) on this study. Study blood work is obtained three times (baseline, 6 months, and 12 months). Blood (about 3 teaspoons).