SEER Inquiry System - Report
Produced: 02/04/2023 5:43 PM
SEER EOD-88, 3rd Ed, 3
For cases diagnosed 1998-2003:
Code the EOD-Extension to 99 [Unknown] for this case until more information is received. The available information does not describe the primary site and there is a complete lack of staging information.
Head and neck cancers spread early and often to nodes. Do not code the EOD-Extension to localized when the information is as limited as it is for this example.