Overdiagnosis likely due to improvements in imaging technology and overtesting, say researchers
By Tricia Lo, CBC News
By Tricia Lo, CBC News
Researchers point to the rapid increase in thyroid cancer incidence especially since 1990, the variation among provinces and the peak in middle-aged women, saying these trends do not correspond to any known cause or risk factor for thyroid disease and instead likely stem from overdiagnosis. (Ryan Remiorz/Canadian Press)
Three out of four Canadians diagnosed with thyroid cancer don't actually have it and are being misdiagnosed because of the increased use of ultrasound imaging, says a new study published by University of Calgary researchers.
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