title: Revisiting overdiagnosis and fatality in thyroid cancer.
abstract: OBJECTIVE
  To examine the rates of incidence and fatality in cohorts of patients diagnosed with thyroid cancer from 1975 to 1999.
  
  
  METHODS
  This study uses National Cancer Institute's Surveillance, Epidemiology and End Results data and derives hazard functions in order to examine the fatality in thyroid cancer.
  
  
  RESULTS
  The study documents forms of rapidly evolving and fatal tumors as well as forms of tumor that evolve more slowly to cause death. It demonstrates that the incidences of nonfatal forms of thyroid cancer have risen dramatically in the years from 1975 to 1999-mostly due to papillary carcinomas-but that the incidences of fatal forms of thyroid cancer have remained nearly constant.
  
  
  CONCLUSIONS
  The results of this study support the notion that many thyroid cancers are part of a reservoir of nonfatal tumors that are increasingly being overdetected and overdiagnosed.
authors.affiliation: Laboratory Medicine 113, VA Medical Center, 508 Fulton St, Durham, NC 27705; e-mail Robin.Vollmer@med.va.gov.
authors.forename: Robin T
authors.initials: RT
authors.lastname: Vollmer
mesh_terms: D002277:Carcinoma / Q000453:epidemiology / Q000473:pathology; D002291:Carcinoma, Papillary / Q000453:epidemiology / Q000473:pathology; D006801:Humans; D015994:Incidence; D018426:SEER Program; D016019:Survival Analysis; D000077273:Thyroid Cancer, Papillary; D013964:Thyroid Neoplasms / Q000453:epidemiology* / Q000401:mortality / Q000473:pathology; D014481:United States / Q000453:epidemiology
keywords: Fatality of thyroid cancer; Hazard; Overdiagnosis; Survival