Many subtypes of papillary thyroid cancer (PTC) have been described, of which classic PTC is the most common (70%-80%). The follicular variant of PTC (FVPTC) is the second most common subtype. It has increased in incidence by 4-fold in the last 3 decades, now making up approximately 20% of all thyroid cancers in Europe and North America.1,2
Patel KN. Noninvasive Encapsulated Follicular Variant of Papillary Thyroid “Cancer” (or Not): Time for a Name Change . JAMA Oncol. 2016;2(8):1005–1006. doi:10.1001/jamaoncol.2016.0714
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