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SEER Inquiry System - Report
Produced: 10/17/2025 6:21 AM
Question 20190108
Inquiry Details
References:
2018 SEER Manual. Appendix C: Breast Coding Guidelines
Question:
Primary site--Breast: how is subsite coded for a breast cancer when it is described as central portion between 1-3:00 or central portion at 12:00?
Discussion:
Answer:
See the SEER coding guidelines for breast, https://seer.cancer.gov/manuals/2018/AppendixC/Coding_Guidelines_Breast_2018.pdf Generally, codes C502 - C505 are preferred over C501. C501 would be preferred over C508. Apply these general guidelines when there is no other way to determine the subsite using the available medical documentation.
Table 1, Primary Site codes, in the breast solid tumor rules also provide helpful information for coding site.
Cancer Site Category:
Breast
Data Item Category:
Primary site
Other Category:
N/A
Year:
2019
