SEER Inquiry System - Question 20041090 Details

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Produced: 04/24/2026 11:25 PM

Question 20041090

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Inquiry Details

References:

#1: CS Manual, Part II, 409. Vers 1.0, Jan. 1, 2004

#2: 2004 SEER Manual, C-391. Appendix C

Question:

CS Extension/CS Mets at Dx--Lung: How are these fields coded for bilateral pleural effusion for a right lung primary? A code of 72 in the CS Extension field leads to a T4, but bilateral pleural effusion is M1. Should CS Mets at Dx be coded 39?

Discussion:

Answer:

This answer was provided in the context of CSv1 coding guidelines. The response may not be used after your registry database has been converted to CSv2.

For bilateral malignant pleural effusion, code the ipsilateral malignant effusion in CS Extension and the contralateral malignant effusion in CS Mets at Dx. Assuming the bilateral pleural effusion is the furthest extension in this case, code CS Extension to 72 [Malignant pleural effusion]. Code CS Mets at Dx to 40 [Distant mets, NOS].

Cancer Site Category:

Lung

Data Item Category:

N/A

Other Category:

N/A

Year:

2004