Fig. 3

Ultrasound and pathological images of antibody-positive and antibody-negative cases. A1: Antibody-positive ultrasound: red = excluded area (tumor), green = ROI, yellow = reference area. A2: Antibody-negative ultrasound: same color codes as A1. B1: Antibody-positive pathology (40x): 10–20 % lymphocyte infiltration; yellow arrow = thyroid tumor, green arrow = lymphocyte cluster.B2: Antibody-negative pathology (40x): 5% lymphocyte infiltration; same arrow indicators as B1. C1: Antibody-positive pathology (100x): 10–20 % lymphocyte infiltration. C2: Antibody-negative pathology (100x): 5% lymphocyte infiltration; green arrow = lymphocyte cluster