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SEER Inquiry System - Report
Produced: 11/04/2025 6:47 AM
Question 20091030
Inquiry Details
References:
2007 SEER Manual, C-1020, C-1044, C-1060. Appendix C
Question:
MP/H Rules/Multiple Primaries--Thyroid: How many primaries should be coded if there is a clinical diagnosis of recurrent thyroid carcinoma in 3/08 in a patient with a history of thyroid carcinoma diagnosed in 1995 with a 2002 clinical recurrence? See Discussion.
Discussion:
Thyroid carcinoma diagnosed in 11/95 and treated with total thyroidectomy (although path report only mentions the left lobe) and ablation. Elevated thyroglobulin level in 11/02, stated to have recurrent carcinoma and again treated with ablation. History on this case states patient had a near total thyroidectomy at diagnosis. Patient is seen again at a third hospital 3/08. Diagnosis again is recurrent carcinoma apparently because of a thyroid mass that is palpable. No treatment was performed and patient expired 4/08. Is this a new primary because of MP/H rule M10?
Answer:
For cases diagnosed 2007 or later:
The pathology report takes precedence over the other information when there is a discrepancy. Based on the information available, only the left thyroid lobe was removed 11/95.
Use the 2007 MP/H rules to evaluate new tumors. If the 3/08 diagnosis represents a new tumor, use the MP/H rules. If the diagnosis in 3/08 is not new tumor, the MP/H rules do not apply.
For this case, a new tumor in 3/08 would be a new primary using rule M10 for Other Sites.
Cancer Site Category:
Thyroid
Data Item Category:
N/A
Other Category:
Multiple primaries
Year:
2009
