Thyroid gland weight (β = 3.68, p < 0.001), thyroiditis (β = -29.51, p = 0.027), and tumor size (β = 41.7, p < 0.001) were significantly correlated with preoperative serum Tg levels, while TNM stage was not (Supplementary Table 1). The gene discussed is TG; the disease is thyroid gland disorder.