Fig. 4From: Ultrasound features of medullary thyroid cancer as predictors of biological behaviorUS images of medullary thyroid carcinoma nodules categorized by TI-RADS 2. Female patient, 32 years old, 3.8 cm × 2.7 cm × 2.2 cm. The serum calcitonin level was > 2000 pg/mL. a and b Lesion was solid, iso- to hypoechoic echogenicity, well-defined, ovoid shape, small anechoic zone. a A/T < 1. c Enhanced blood flowBack to article page