Noninvasive follicular thyroid neoplasm with papillary-like nuclear features: an update

Noninvasive follicular thyroid neoplasm with papillary-like nuclear features (NIFTP) has been recognized as a diagnostic entity since 2017. It has been shown to exhibit indolent behaviour, and lobectomy alone is advocated as the treatment of choice. In this review, the diagnostic challenges including interobserver variation, the role of artificial intelligence, and the latest data on the risk of recurrence or metastasis, is evaluated.

Diagnosis of NIFTP is reliant on examination of the entire tumour-parenchymal interface. Strict criteria are required in order to establish a diagnosis. Inter-observer variation exists even among experienced thyroid pathologists. Recent studies continue to support the nonaggressive nature of NIFTP lesions.

NIFTP is considered a low risk follicular-cell derived thyroid neoplasm. Adherence to diagnostic criteria is crucial in accurately applying the diagnosis. Further long-term follow up is required in order to establish guidelines on the long term management of these patients.