The cancer sites available in Fast Stats have been coded based on SEER specifications. The site definitions used for cancer incidence are based on a combination of ICD-O-3 Site Code and ICD-O-3 Histologic Type. The site definitions used for cancer mortality are based on the cancer codes defined in ICD-8 through ICD-10.
See the SEER Site Recode and SEER Cause of Death Recode sections of Fast Stats Resources for detailed listings on how the cancer sites are defined.