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NIH
U.S. National Institutes of Health National Cancer Institute

Localized/Regional/Distant Stage Adjustments

The SEER Program strives to make all Localized/Regional/Distant stage variables consistent for all cancer sites for the appropriate years. However, there are certain site/year combinations where this is not possible. The following tables detail changes imposed by the SEER Program on the SEER Historic and Summary stage variables for each data release.