Ultrasonography and cytology as predictors of noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP): Importance of the differential diagnosis with the invasive encapsulated follicular variant of papillary thyroid cancer

The noninvasive encapsulated follicular variant of papillary thyroid carcinoma (EFVPTC) has an excellent prognosis even if treated only by lobectomy.^1-3 Recently, it was proposed that this tumor should no longer be considered "cancer" and be given the denomination "noninvasive follicular thyroid neoplasm with papillary-like nuclear features" (NIFTP).² There is great interest in knowing the preoperative characteristics of NIFTP since, in view of a high probability of this diagnosis (higher than that of malignancy), less extensive surgery would be more indicated.

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