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SEER Inquiry System - Report
Produced: 03/24/2026 3:52 PM
Question 20190013
Inquiry Details
References:
2018 SEER Manual, 92-93. final version of manual
Question:
Laterality--Head and Neck: Were the topography codes C090 and C091 intentionally left off of the Sites for Which Laterality Codes Must Be Recorded table in the 2018 SEER Manual? The codes were also removed from Table 10 in the 2018 Solid Tumor Rules for Head and Neck but appear under coding instructions 1b. and 6b. in the manual.
Discussion:
Answer:
Thank you for bringing this to our attention. C090 and C091 were intentionally removed from the list of sites for which laterality must be coded. They should have also been removed from coding instructions 1b and 6b. We will make that correction in the next version of the manual.
Cancer Site Category:
Head & Neck
Data Item Category:
Laterality
Other Category:
N/A
Year:
2019
