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King Faisal Specialist Hospital & Research Center

21-gene genomic assay

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Recurrence Score Testing Does Not Appear To Benefit Patients With Grade 1, Progesterone Receptor Positive Breast Cancers: An Opportunity To Eliminate Over-Treatment And Decrease Testing Costs, Udai S. Sibia, Thomas J. Sanders, Charles Mylander, Martin Rosman, Carol Tweed, Lorraine Tafra, Rubie S. Jackson Mar 2022

Recurrence Score Testing Does Not Appear To Benefit Patients With Grade 1, Progesterone Receptor Positive Breast Cancers: An Opportunity To Eliminate Over-Treatment And Decrease Testing Costs, Udai S. Sibia, Thomas J. Sanders, Charles Mylander, Martin Rosman, Carol Tweed, Lorraine Tafra, Rubie S. Jackson

Hematology/Oncology and Stem Cell Therapy

Background: We previously described a risk prediction model (Anne Arundel Medical Center [AAMC] model) based on pathology which may eliminate the need for recurrence score (RS) testing in select early-stage breast cancers. There is a concern that patients in discordant risk prediction groups (AAMC vs. RS) may be overtreated or undertreated if RS testing were omitted. Methods: We queried the Surveillance, Epidemiology, and End Results (SEER) database for all breast cancer patients between 2004 and 2015. AAMC low-risk was defined as Grade 1 and progesterone receptor-positive (PR þ ) tumors, while AAMC high-risk was defined as Grade 3 or estrogen-negative …