Clodronate With or Without Chemotherapy and/or Hormonal Therapy in Treating Women With Stage I or Stage II Breast Cancer

RATIONALE: Clodronate may be effective in preventing the spread of cancer to the bones and other parts of the body. It is not yet known whether clodronate is more effective alone or combined with chemotherapy and /or hormonal therapy in preventing metastatic breast cancer. PURPOSE: Randomized phase III trial to determine the effectiveness of clodronate with or without chemotherapy and /or hormonal therapy in preventing metastases in women who have stage I or stage II breast cancer.