The tags extracted by the two classification methods of title and keyword are: (Fig. 4A) malignant thyroid neoplasm, data system, undermined significance, diagnostic performance, solitary thyroid nodule, indeterminate thyroid nodule, radiofrequency ablation, ultrasound elastography, benign thyroid nodule, 18-fluorodeoxyglucose positron emission tomography (FDG-PET), and video-assisted thyroidectomy, (Fig. 4B) galectin-3, calcitonin, ultrasound, ultrasonography, frozen section, molecular testing, radiofrequency ablation, elastography, thermal ablation, FDG-PET scan, and minimally invasive. This evidence concerns the gene CALCA and thyroid cancer.