[A case of breast cancer with multiple bone metastases that responded remarkably to doxifluridine (5'-DFUR), cyclophosphamide (CPA), medroxyprogesterone acetate (MPA) and pamidronate disodium therapy].

A 49-year-old female underwent bilateral breast preserving surgery for heterochronic breast cancers. She later developed a sternal metastasis and was recommended for intravenous chemotherapy. However, she refused such an intensive therapy and opted for immunotherapy. Afterward, she came to our hospital because of spinal metastases with back pain. She was treated with oral administration of 5'-DFUR and MPA 1,200 mg/day for 3 weeks, respectively, CPA 100 mg/day for 2 weeks, and pamidronate disodium 30 mg intravenously every 4 weeks. This combined chemotherapy relieved her pain after one course. After 5 courses, tumor markers were reduced to the normal range. After 14 courses, bone X-P revealed that the osteolytic bone showed sclerotic changes and bone scintigraphy showed a complete remission (CR). The adverse effects were not remarkable. This regimen is possible on an outpatient basis, and it may play an important role from the standpoint of treatment effectiveness and the quality of life of the patient.