Atul Gawande on overdiagnosis

In his New Yorker article Dr. Atul Gawande talks about--among other things--overdiagnosis:

More than a third of the population turns out to have these tiny cancers in their thyroid, but fewer than one in a hundred thousand people die from thyroid cancer a year. Only the rare microcarcinoma develops the capacity to behave like a dangerous, invasive cancer.