Thyroid cancer increase mystifying.  Better methods of detection, but new research suggests an unknown factor may be involved.
D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D018426:SEER Program; D013964:Thyroid Neoplasms / Q000175:diagnosis* / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology