CALCA and thyroid nodule: Variables with a p‐value less than 0.1 from the preceding analyses (multiple suspicious lymph nodes, multifocal thyroid nodules, unclear LN boundary, LN blood flow, LN L/T ratio (lymph node longitudinal diameter/ transverse diameter), tumor L diameter, tumor T diameter, raised postoperative CEA and calcitonin), and suspicious sonograph result for lateral lymph node enlargement were subjected to binary logistic analysis.