Improved disease-specific survival (DSS) and relative survival improvements in thyroid cancer. (a) Surveillance, Epidemiology, and End Results (SEER) 10-year relative survival changes from 1983 to 1999 for all thyroid cancer. (b) Memorial Sloan Kettering Cancer Center (MSKCC) 10-year DSS changes from 1950 to 2005 for all thyroid cancer. (c) SEER 10-year relative survival changes from 1983 to 1999, stratified by size. (d) MSKCC 10-year DSS changes from 1950 to 2005, stratified by size. (e) SEER 10-year relative survival changes from 1983 to 1999, stratified by N and M status.