Molecular genotyping of the non-invasive encapsulated follicular variant of papillary thyroid carcinoma.

There were no differences in clinicopathological or molecular profiles between non-invasive and invasive encapsulated FVPTCs, except in vascular and capsular invasion. Therefore, the diagnosis of NIFTP, like that of follicular adenoma, may require surgical resection and exclusion of those tumours with any papillae.