OnCo
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NSABP Foundation

aka National Surgical Adjuvant Breast and Bowel Project, NSABP

The legacy US surgical adjuvant trials group that proved lumpectomy equals mastectomy, tamoxifen prevents breast cancer and trastuzumab cures more HER2-positive disease.

Founded in 1958 and led for decades by Bernard Fisher, the NSABP ran the trials that rewrote breast cancer surgery and adjuvant therapy: B-04 and B-06 showed breast conservation equals mastectomy, B-14 and B-20 provided the samples that validated the Oncotype DX recurrence score, P-1 showed tamoxifen prevents breast cancer, B-31 (with NCCTG N9831) established adjuvant trastuzumab, and B-32 validated sentinel node biopsy. It also ran colorectal adjuvant trials (C-series). NSABP merged with RTOG and GOG into NRG Oncology in 2014; the NSABP Foundation continues industry-partnered trials such as KATHERINE (with the German Breast Group) and the neoadjuvant B-series.

Location
Pittsburgh, PA, US
Type
consortium
Newsweek 2026 oncology rank
Not in top 300 listing used
OnCo score
#124 · 32 points (0 Newsweek + 0 NCI + 32 from 16 linked objects) · ranking

Programmes

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  • B-04 / B-06 (breast conservation)
  • P-1 (tamoxifen prevention)
  • B-31 (adjuvant trastuzumab)
  • KATHERINE (with GBG)
  • Oncotype DX validation (B-14, B-20)

Connected

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