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Solid Tumor Rules: December 2020 Update
We continue to review the current solid tumor rules and have updated them based on questions and feedback we have received. We have consulted with specialty matter experts to provide clarification of histology coding rules. ICD-0-3.2 changes have also been added to applicable site modules. Most changes are minor: terminology, additional definitions, new notes and examples. In order to clarify histology coding instructions, new rules have been added and histology tables updated. These updates do not require review of already abstracted cases. The December 2020 rules replace the current rules and should be used now. We strongly recommend you read the December 2020 Change Log to understand what changes were made.
The updated Solid Tumor Rules may be accessed at: https://seer.cancer.gov/tools/solidtumor/
Editor, Solid Tumor Rules