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SEER Inquiry System - Report
Produced: 02/07/2026 12:33 AM
Question 20110130
Inquiry Details
References:
2007 MP/H Rules
Question:
Discussion:
09/2010: RUL/RML lobectomy: Two separate nodules. One nodule showed clear cell adenocarcinoma, and the other showed adenocarcinoma (NOS). Potential brain metastasis per scan. Patient also received chemotherapy. These are two separate primaries per rule M11.
07/2011: New LLL mass + satellite nodule, biopsy of LLL mass compatible with adenocarcinoma (NOS).
Is the 07/2011 an additional new primary per rule M7? Or is it the same primary as the 09/2010 adenocarcinoma per rule M12?
Answer:
For cases diagnosed 2007 or later: The 2011 diagnosis of adenocarcinoma, NOS in the left lower lobe lung is a separate primary.
The steps used to arrive at this decision are:
Open the Multiple Primary and Histology Coding Rules manual. For a lung primary, use the Lung Multiple Primary rules to determine the number of primaries.
The 2010 right lung bi-lobectomy showed two separate tumors that were determined to be two primaries: clear cell adenocarcinoma [8310/3] and adenocarcinoma, NOS [8140/3]. The histology of the new left lung mass is adenocarcinoma, NOS [8140/3].
Start at Rule M3 using the MULTIPLE TUMORS module because this patient has more than one tumor. The rules are intended to be reviewed in consecutive order within the module (i.e., from Rule M3 to Rule M12 in this case). Stop at the first rule that applies to the case you are processing. This patient has two tumors in each lung with ICD-O-3 histology codes that are different at the second (xxxx) digit. Abstract the LLL adenocarcinoma as a new primary [C343, 8140/3].
The patient has two tumors in each lung. The right lung showed adenocarcinoma and clear cell adenocarcinoma. The two tumors in the left lung were both adenocarcinomas. Clear cell adenocarcinoma [8310] on the right is different at the second digit from adenocarcinoma [8140] on the left. Rule M12 cannot be applied to this case, because Rule M7 is the first rule that applies to this case when processing the rules in consecutive order.
