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SEER Inquiry System - Report
Produced: 03/04/2026 7:40 AM
Question 20240028
Inquiry Details
References:
#1: 2024 SEER Manual. Appendix C: Breast Coding Guidelines
#2: Solid Tumor Rules. Breast, 2024 Update
Question:
2024 SEER Manual/Primary Site--Breast: Is Primary Site coded as C504 or C501 based on the Solid Tumor Rules and the SEER Manual Breast Coding Guidelines? The pathology report reads "Right Breast 10:00 1 cm from the nipple."
Codes C502-C505 take priority over code C501. The description for C501 in the Solid Tumor Rules has "Area extending 1 cm around areolar complex."
Discussion:
Answer:
Assign Primary Site code C504 based on the location in the upper outer quadrant of the right breast, 10 o’clock, as opposed to code C501, around the areolar complex. The 2024 SEER Manual Breast Coding Guidelines advise that C502 - C505 are generally preferred over C501 when there is no other way to determine the subsite.
