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SEER Inquiry System - Report
Produced: 04/15/2025 1:00 AM
Question 20091114
Inquiry Details
References:
2007 SEER Manual, 7. #A.7.
Question:
MP/H Rules/Multiple primaries--Breast: Would a left chest wall mass excision stated to be ductal carcinoma consistent with a breast primary and, "compatible with either local recurrence or potentially a metastasis" be a new primary per the MP/H rules? See Discussion.
Discussion:
Patient underwent mastectomy in 1986 for infiltrating ductal carcinoma of left breast. Excision of left chest wall mass in March 2009 showed ductal carcinoma consistent with breast primary. The pathology report COMMENT stated it would be compatible with either local recurrence or a metastasis. The patient's primary breast carcinoma material is not available for direct comparison and the MP/H rules instruct us to ignore metastasis.
Answer:
For cases diagnosed 2007 or later, the MP/H rules do not apply to metastasis. If there is no further information available for this case, the MP/H rules do not apply to the 2009 diagnosis.
Cancer Site Category:
Breast
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2009
