SAT-461 NIFTP: A Painstaking Diagnosis Through the Pathologist’s Eyes

摘要

Non-invasive encapsulated follicular variant of papillary thyroid cancer (EFVPTC) was recently reclassified as non-invasive follicular thyroid neoplasm with papillary-like nuclear features (NIFT-P).1 In 2018, revised and stricter criteria were proposed for a lesion to qualify as NIFT-P including no well-formed papilla or BRAF-V600E mutation.2 We are presenting an interesting case to highlight the importance of scrutinizing pathology slides to diagnose NIFTP with these more strict criteria.