CHICAGO (AP) -- A new study says thyroid cancer cases are soaring because of overdiagnosis and treating tumors too small to ever cause harm.
The study found cases nearly tripled since 1975.
It's the latest research to question whether all cancers need aggressive treatment. Others have suggested that certain cancers of the prostate, breast and lung as well as thyroid grow so slowly that they'll never become deadly. Some researchers think overzealous screening leads to overtreatment.
Thyroid cancer treatment often includes surgery to remove the butterfly-shaped gland, plus lifelong daily hormone pills.
The study was published online Thursday in JAMA Otolaryngology.