SEER Inquiry System - Question 20000449 Details

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Produced: 06/18/2026 3:56 AM

Question 20000449

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Inquiry Details

References:

SEER EOD-88, 3rd Ed, 90

Question:

EOD-Extension/EOD-Lymph Nodes--Lung: Is "subcarinal extension" with no mention of lymph nodes coded in the EOD extension field or in the EOD lymph node involvement field? See discussion.

Discussion:

Should "subcarinal extension" with no mention of lymph nodes be assumed to be direct contiguous extension of the primary tumor or does it represent lymph node involvement?

If it is direct extension, should we code it as 70 in the extension field? If not, should we code it as 2 in the lymph node involvement field?

Answer:

For cases diagnosed 1998-2003:

Code the EOD-Extension field to 70 [mediastinum, direct extension].

Cancer Site Category:

Lung

Data Item Category:

N/A

Other Category:

N/A

Year:

2000