An official website of the United States government
Home
SEER Inquiry System - Report
Produced: 01/05/2026 2:51 AM
Question 20170025
Inquiry Details
References:
2007 MP/H Rules. Breast, M Rules
Question:
MP/H Rules/Multiple primaries--Breast: Is this the same primary per MP/H Rule M10? Ductal carcinoma of the left breast in 2013, treated with a lumpectomy. New tumor with ductal and lobular carcinoma in the same breast in 2016.
Discussion:
Answer:
The 2016 diagnosis is the same primary. MP/H Rule M10 for breast cancer applies. Do not change the original histology code. Use text fields to document the later histologic type -- duct and lobular.
Cancer Site Category:
Breast
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2017
