Fingernails in Evaluating Bone Health in Postmenopausal Women With Breast Cancer Undergoing Hormone Therapy on Clinical Trial IBCSG-1-98
Breast Cancer, Osteoporosis
About this trial
This is an interventional treatment trial for Breast Cancer focused on measuring osteoporosis, stage I breast cancer, stage II breast cancer, stage IIIA breast cancer
Eligibility Criteria
DISEASE CHARACTERISTICS:
Enrolled on protocol IBCSG-1-98
- Currently receiving (i.e., have not yet completed) 5 years of treatment with tamoxifen or letrozole and expected to receive ≥ 6 months of additional treatment on protocol IBCSG-1-98
- No recurrent breast cancer or second primary cancer
- No known bone disease (including osteomalacia or osteogenesis imperfecta)
Hormone receptor status
- Estrogen and/or progesterone receptor positive tumor
PATIENT CHARACTERISTICS:
- Female
- Postmenopausal
- No uncontrolled thyroid or parathyroid disease, Cushing's disease, or other pituitary diseases
- No malabsorption syndrome or clinically relevant vitamin D deficiency
PRIOR CONCURRENT THERAPY:
- See Disease Characteristics
- More than 1 year since prior and no concurrent anticonvulsants
- More than 6 months since prior and no concurrent corticosteroids at doses > the equivalent of 5 mg/day of prednisone for > 2 weeks total
- No prior or concurrent sodium fluoride at daily doses ≥ 5 mg/day for > 1 month
- More than 12 months since prior and no concurrent anabolic steroids
- More than 6 months since any prior drug for the prevention of osteoporosis (excluding calcium or cholecalciferol [vitamin D])
- Concurrent warfarin allowed provided duration of treatment is no more than 4 weeks
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Experimental
Experimental
tamoxifen and no bone fracture
Letrozole and no bone fracture
Tamoxifen and bone fracture
Letrozole and bone fracture
Patients randomized to Arm A of Study BIG 1-98 (tamoxifen for 5 years) who have not had a bone fracture.
Patients randomized to Arm B of Study BIG 1-98 (letrozole for 5 years) who have not had a bone fracture.
Patients randomized to Arm A of Study BIG 1-98 (tamoxifen for 5 years) who have had a bone fracture.
Patients randomized to Arm B of Study BIG 1-98 (letrozole for 5 years) who have had a bone fracture.