Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Cumulative incidence of invasive ipsilateral breast tumor recurrences within categories of margin status and treatment in the National Surgical Adjuvant Breast and Bowel Project B-24 trial. Treatment groups were lumpectomy with radiation therapy plus 5 years of placebo (LRT + placebo) or tamoxifen (LRT + TAM), without tumor at margins, or with involved or unknown tumor at margins as defined in the B-24 trial.
