Fig. 2.

Relationship between calcification type on ultrasonography and ultrasonic diagnosis of thyroid nodules in new outpatients. Among 2,902 nodules in 2,678 new outpatients, 747 nodules (26%) had calcifications and 2,155 nodules (74%) did not. Ultrasonic diagnosis of thyroid nodules was performed using Kuma Hospital’s ultrasound classification system (malignant, borderline, or benign). The relationship between the calcification type and ultrasonic diagnosis was investigated in these 747 nodules with calcifications.