SEER Inquiry System - Report
Produced: 10/10/2025 2:56 PM
Question 20041090
Inquiry Details
References:
#1: CS Manual, Part II, 409. Vers 1.0, Jan. 1, 2004
#2: 2004 SEER Manual, C-391. Appendix C
Question:
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].