Fig. 11From: Ultrasound in active surveillance for low-risk papillary thyroid cancer: imaging considerations in case selection and disease surveillance27-Year-old female with 14 mm PTC in left isthmus of thyroid gland. The nodule has a right angle/obtuse angle contact with the trachea which suggests a high risk of invasion into trachea. In addition, there is gross ETE noted anteriorly with disruption of the echogenic line and tumor extension to the strap muscles (arrowhead). The patient was not offered AS in our study and underwent surgeryBack to article page