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SEER Inquiry System - Report
Produced: 12/09/2025 3:30 AM
Question 20100062
Inquiry Details
References:
2010 SEER Manual
Question:
MP/H Rules/Histology--Lung: How is histology coded when there is a lung biopsy compatible with non-small cell carcinoma and regional lymph node biopsies compatible with adenocarcinoma? See Discussion.
Discussion:
Which histology has priority when the pathology specimens reveal different histologies in the primary site and the regional lymph node? Do we assume the lung biopsy is the most representative tumor specimen because it is from the primary site and code to 8046 [non-small cell carcinoma] or should we use rule H5 and code to 8140 [adenocarcinoma, NOS] because adenocarcinoma is a more specific histology than non-small cell carcinoma?
Answer:
For cases diagnosed 2007 or later, code histology based on a pathology report from the primary site whenever possible. Code histology to 8046/3 [non-small cell carcinoma] for the case example provided.
Cancer Site Category:
Lung
Data Item Category:
Histology
Other Category:
N/A
Year:
2010
