Fig. 1From: Clinicopathological and ultrasound features as risk stratification predictors of clinical and pathological nodal status in papillary thyroid carcinoma: a study of 748 patientsUltrasound features of the PTC tumor and lymph node: a1 and a2 show tumor size > 2 cm and capsule contact; b1 and b2 show extrathyroidal extensions (ETE); c1 and c2 show capsule contact and lateral metastatic lymph node (III): the lymph node appear enlarged, roundBack to article page