Abstract
Cytologic examination of fine needle aspiration (FNA) specimens from thyroid nodules is the key test for the evaluation of thyroid nodules, and the results are critical in the selection of patients with nodules for thyroid surgery. Although needle placement for FNA is traditionally and most commonly guided by nodule palpation alone, the widespread availability of thyroid ultrasonography has made possible a technical refinement of this technique, needle placement under ultrasonographic guidance. Ultrasound-guided FNA is often valuable, and sometimes essential, in obtaining accurate diagnostic material. This chapter reviews the role of ultrasound-guided fine needle aspiration (UG FNA) in the diagnosis of thyroid nodules.
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