Fig. 6From: Ultrasound features of medullary thyroid cancer as predictors of biological behaviorUS images of medullary thyroid carcinoma nodules categorized by TI-RADS 3. Female patient, 48 years old, 1.8 cm × 1.4 cm × 1.4 cm. The serum calcitonin level was 960 pg/mL. a and b Lesion was solid with a little of fluid sonolucent area, hypoechoic, well-defined, ovoid to round in shape. a A/T < 1. c Absent blood flowBack to article page