Differentiated thyroid cancer, which accounts for more than 90% of all thyroid cancers, has a good prognosis for the most part through standardized surgery-based comprehensive treatment because of its better differentiation, lower malignancy, slow progression of lesions, and the fact that DTC originates from thyroid follicular epithelial cells, which have the ability to take up iodine.
Stratification according to the risk of postoperative recurrence is as follows.
I. Low risk
Those who meet all of the following conditions
1. No local or distant metastasis.
2. All tumors visible to the naked eye have been completely removed.
3. The tumor did not invade the surrounding tissues.
4.The tumor is not an invasive histological subtype and there is no vascular invasion.
5.If this patient undergoes WBS after nail clearance, there is no iodine uptake outside the thyroid bed.
II. Intermediate risk
Those who meet any of the following conditions
1 Pathological examination after initial surgery can reveal microscopically that the tumor has peri-thyroidal soft tissue invasion.
2 There is lymph node metastasis in the neck or abnormal radioactive uptake is found by WBS after nail clearance.
3 The tumor is an aggressive histological subtype or has vascular invasion.
High risk
Those who meet any of the following conditions
1.Tumor invasion of surrounding tissues or organs is visible to the naked eye.
2. The tumor is not completely resected, and there is residue during surgery.
3.With distant metastasis.
4.After total thyroidectomy, the serum Tg level is still high.
5.A family history of thyroid cancer.