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SEER Inquiry System - Report
Produced: 04/03/2026 11:08 AM
Question 20031090
Inquiry Details
References:
#1: SEER Program Code Man, 3rd Ed, 119
#2: SEER EOD-88,3rd Ed
Question:
EOD-Size of Primary Tumor/First Course Treatment--Breast: How is tumor size coded when preventative tamoxifen treatment precedes breast cancer diagnosis? Can we code the tumor size from the surgical specimen? Is tamoxifen treatment here? See Description.
Discussion:
What is the tumor size in this situation? Patient is on the STAR trial (preventative tamoxifen for women with high risk for breast cancer). Patient develops breast cancer and has surgery.
Answer:
For cases diagnosed 1998-2003: Code EOD-Size of Primary Tumor from the surgical pathology report.
Do not code this preventative tamoxifen as first course cancer-directed treatment. This tamoxifen was part of a clinical trial intending to delay or prevent beast cancer from developing.
