Inclusion Criteria
- New diagnosis of DCIS without invasive cancer; date of diagnosis defined as the date of the first pathology report that diagnosed the patient with DCIS
- Unilateral, bilateral, unifocal, or multifocal DCIS
- No previous history of breast cancer (DCIS or invasive cancer) in either breast prior to current DCIS diagnosis
- 40 years of age or older at time of DCIS diagnosis
- ECOG performance status 0 or 1
Exclusion Criteria
- All grade III DCIS
- Concurrent diagnosis of invasive or microinvasive breast cancer in either breast
- Use of investigational cancer agents within 6 weeks prior to diagnosis
- Documented history of prior tamoxifen, aromatase inhibitor, or raloxifene in last 6 months
Please contact Legacy Oncology Research for additional study inclusion/exclusion information.