The values for this data item are based on the chapters of the AJCC manual. Values for this data item will be derived primarily from the site/histology fields and other data items as required.

This data item will be used to create an efficient process for running TNM Edits.

Each Site-Specific Data Item (SSDI) applies only to selected primary sites, histologies, and years of diagnosis. Depending on applicability and standard-setter requirements, SSDIs may be left blank.