A Case of Sudden Diffuse Thyroid Swelling after Fine Needle Aspiration Cytology where Changes over Time Were Confirmed by Ultrasonography

Abstract We encountered a case of diffuse thyroid swelling after fine needle aspiration (dTSaFNA) cytology, and monitored the by ultrasonography. The scan findings are reported. A 57-year-old female visited our hospital complaining in her anterior neck. She had history metal allergy was not taking any medications. Because solid cystic tumor detected left lobe, we decided to perform fine-needle cytology (FNAC). When second performed with 22G inserted into nodule patient immediately complained pain Within 2 minutes, neck swelled up ultrasonography showed vascular dilatation lobe. Neck cooling steroid injection undertaken. However, over next 5 also spread right About 15 minutes later, vessels gradually became unclear, persisted, hospitalized for observation. By following day, all symptoms signs resolved discharged. FNA is associated risk caused hemorrhage or dTSaFNA. To make prompt diagnosis provide appropriate treatment this complication, could be useful.