Vanishing Thyroid Tumors: A Diagnostic Dilemma After Ultrasonography-Guided Fine-Needle Aspiration

Abstract

US-guided FNA may lead to complete obliteration of thyroid nodules, rendering final diagnosis upon thyroidectomy difficult or impossible. In these unusual circumstances, the possibility that the surgical pathology may be nonrepresentative should be considered if the cytologic features on FNA are sufficient by themselves to support a definitive diagnosis of PTC.