Thyroid Ultrasound Examination: Results of the Third Full-scale Survey (Fourth-round Survey)

These are the results of the third Full-scale Survey which was the fourth round of the Thyroid Ultrasound Examination.

Participants diagnosed as Grade A in the Primary Examination accounted for 99.2% of the total, while those diagnosed as Grade B accounted for 0.8%. Most of those diagnosed as Grade A2 had cysts of 20 mm or smaller and those diagnosed as Grade B had nodules of 5.1 mm or larger. This tendency was the same as that observed in the Preliminary Baseline Survey and the first and second Full-scale Surveys (second- and third-round surveys).

In the Confirmatory Examination, as a result of fine-needle aspiration cytology, 39 participants were diagnosed that their tumors were malignant or suspicious for malignancy.

• Included in this reference material on March 31, 2021
• Updated on March 31, 2023