Optimal timing of repeat thyroid fine-needle aspiration biopsy.

Objectives: The objective of this study is to determine the optimal interval between repeat thyroid fine-needle aspiration (FNA) biopsies in children and adolescents and to evaluate whether this has any impact on the final pathological diagnosis.

Methods: The sample of this retrospective single-center study consisted of 99 patients who had thyroid nodules and underwent thyroid ultrasonography (USG) and FNA biopsy between 2013 and 2023. The interval between FNA biopsies as well as biopsy and surgical cytology results were recorded for each patient.