Fig. 5From: Ultrasound features of medullary thyroid cancer as predictors of biological behaviorUS images of medullary thyroid carcinoma nodules categorized by TI-RADS 3. Male patient, 40 years old, 3.06 cm × 2.36 cm × 1.85 cm. The serum calcitonin level was <2 pg/mL. a and b Lesion was solid, hypoechoic, ill-defined, ovoid to round in shape, microcalcifications. a A/T < 1. c Absent blood flowBack to article page