SEER Inquiry System - View
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| Question: 20091097 | |
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Status Final References Source 1: Sngl vs Sbsq Prim Lymph & Hem pgs: Notes: 02/28/2001 Source 2: 2007 SEER Manual pgs: 9 Notes: Question Histology--Lymphoma: If two different histologies of the same type of Lymphoma (two different histologies for NHL: DLBCL 9680/3 + Mantle Cell Lymphoma 9673/3) occur in the same time in different lymph nodes, how do we code the histology, and what would be the sequence number if this would be considered as multiple primaries? Please see discussion. Discussion I understand that if both HL and NHL histology existed at the same time, this will be one primary only and histology code would be composite lymphoma (9596/3). Answer It is important to note for this case that the two different types of NHL occurred in different lymph nodes; one type in one lymph node and the other type in another lymph node. Use the fold-out table to determine single vs multiple primaries. According to the table, 9673/3 and 9680/3 would be two primaries no matter which of these was "first."
Assign the lower sequence number to the primary with the worse prognosis when two primaries are diagnosed simultaneously. Base the prognosis decision on the primary site, histology, and extent of disease for each of the primaries. If there is no difference in prognosis, the sequence numbers may be assigned in any order.
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