Ultrasound-Guided Fine Needle Aspiration of the Thyroid

An ultra­sound-guid­ed fine nee­dle aspi­ra­tion (FNA) is gen­er­al­ly ordered when imag­ing stud­ies can­not accu­rate­ly deter­mine the cause of a nod­ule (or growth) in the thy­roid gland or to help deter­mine if it is benign (non-can­cer­ous) or malig­nant (can­cer­ous).

This test uses sound waves in order to take a sam­ple of a thy­roid nod­ule for exam­i­na­tion with a small nee­dle. This pro­ce­dure is less inva­sive than a sur­gi­cal biop­sy and requires min­i­mal prepa­ra­tion with lit­tle to no scarring.