Breast Cancer DCIS NCT00053898

Instructions: Use NCI's Common Terminology Criteria for Adverse Events (CTCAE) Version 4.0 to report all grade 2, 3, 4, or 5 adverse events (AEs). To access the CTCAE, go to the NCI/CTEP web site: http://ctep.cancer.gov. Submit Form AE to the NSABP Biostatistical Center every 6 months during tamoxifen/anastrozole therapy and 6 months after the last administered dose. There should be no time lapse or overlap of dates between the Reporting Period End Date from the previous Form AE and the Reporting Period Start Date of the current Form AE.