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SEER Inquiry System - Report
Produced: 02/08/2026 2:28 AM
Question 20071064
Inquiry Details
References:
WHO Class Breast Tumors, 100-101. 2003
Question:
Reportability--Breast: Is a final path diagnosis of "phyllodes tumor, borderline (malignant, low grade)" reportable if the comment states "Features favor the diagnosis of a borderline phyllodes tumor (or also called malignant phyllodes tumor of low grade)"?
Discussion:
Answer:
No, borderline phyllodes tumors (PT) are not reportable. The ICD-O-3 code is 9020/1. According to the WHO Classification of Tumours of the Breast and Female Genital Organs, borderline PT's are also called low grade malignant PT's.
Cancer Site Category:
Breast
Data Item Category:
N/A
Other Category:
Reportability
Year:
2007
