TG and neoplasm: ATA high risk: macroscopic invasion of tumor into the perithyroidal soft tissues, incomplete tumor resection, distant metastases, postoperative serum thyroglobulin suggestive of distant metastases, pathologic N1 with any metastatic lymph node ≥ 3 cm in largest dimension, and follicular thyroid cancer with extensive vascular invasion (more than four foci of vascular invasion).