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SEER Inquiry System - Report
Produced: 10/18/2025 5:39 PM
Question 20091078
Inquiry Details
References:
2007 SEER Manual, C-17, C-26, C-33 to C34. Appendix C
Question:
MP/H Rules/Multiple Primaries--Head & Neck: How many primaries should be reported when an invasive squamous cell carcinoma of the right mandibular body (C06.9) was diagnosed in 2004 (treated with surgery and radical neck dissection), and an invasive squamous cell carcinoma of the left buccal mucosa (C06.0) was diagnosed in 2007? See Discussion.
Discussion:
According to the MP/H Rules, it appears Rule M12 would apply since none of the others fit and these would be a single primary.
Answer:
For cases diagnosed 2007-2014:
Based on the information provided, the primary site code for the 2004 primary should be C031 [mandibular gingiva, lower alveolar mucosa, etc.].
The 2007 diagnosis would be a separate primary according to rule M7 because the patient was disease free following treatment for the 2004 diagnosis. C031 and C060 are different at the third character.
Cancer Site Category:
Head & Neck
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2009
