Related Experiment Video
Updated: May 28, 2026

Substernal Thyroid Biopsy Using Endobronchial Ultrasound-guided Transbronchial Needle Aspiration
Published on: November 10, 2014
Update in thyroid fine needle aspiration
William C Faquin1, Massimo Bongiovanni, Peter M Sadow
1Department of Pathology, WRN 219, Massachusetts General Hospital, 55 Fruit Street, Boston, MA 02114, USA. WFaquin@Partners.org
Abstract:
Thyroid fine needle aspiration (FNA) is a safe, cost effective, and relatively accurate method for guiding the initial management of a thyroid nodule. The popularity of thyroid FNA is reflected in the fact that over 350,000 thyroid FNAs are performed each year in the USA. As we move into the next decade, several issues pertaining to thyroid FNA are being addressed including: how to better apply thyroid FNA as a differential test for follicular-patterned thyroid tumors, how to manage the atypical thyroid FNA, and how to use thyroid FNA in the evaluation of poorly differentiated thyroid carcinomas.
Related Concept Videos
The Thyroid Gland
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...
Goiter
Synthesis and Regulation of Thyroid Hormones
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
Hyperthyroidism II: Pathophysiology
Graves Disease II: Pathophysiology
Hyperthyroidism I: Introduction
