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SEER Inquiry System - Report
Produced: 09/17/2025 3:20 PM
Question 20091096
Inquiry Details
References:
2007 SEER Manual, C-619, C-633, C-644. Appendix C
Question:
MP/H Rules/Multiple primaries--Breast: How many primaries should be reported when an in situ diagnosis is followed by an invasive diagnosis in the same breast 1.5 years later? See Discussion.
Discussion:
Patient had a core biopsy 1/07 that showed DCIS and PE showed no adenopathy. Patient refused resection, and adjuvant treatment. In 6/08, the pt returned for a modified radical mastectomy which showed infiltrating duct carcinoma and positive lymph nodes. A comment in the Correction Record stated "Per MD, patient did not see any urgency and delayed surgery 1.5 years after diagnosis." The patient did not have any treatment in that time period and there is no statement that there was progression.
Answer:
For cases diagnosed 2007 or later, abstract the 6/08 invasive diagnosis as a separate primary according to rule M8. Rule M8 applies whether or not the later diagnosis in this case is progression of disease.
Cancer Site Category:
Breast
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2009
