1.Thyroid adenoma removal: It is applied to isolated thyroid adenoma, which is removed from the adenoma without including the thyroid tissue. 2. Partial lobectomy of thyroid gland: It is used for benign tumors in the lateral lobe of the thyroid gland. For example, thyroid adenoma can be removed together with the tumor and part of the glandular tissue of the same lobe. 3.Total lobectomy of one side of the thyroid gland: It is often used when multiple thyroid adenomas are confined to one side lobe. 4.Partial thyroidectomy (also called subtotal thyroidectomy): Mostly used to treat hyperthyroidism, including nodular hyperthyroidism, multiple thyroid adenomas, and simple goiter, and to relieve pressure symptoms such as difficulty in breathing and swallowing. In patients with severe proptosis, subtotal thyroidectomy may aggravate the degree of proptosis and should be performed with caution. Patients with hyperthyroidism who are more than six months pregnant should wait until after delivery before having most of their thyroid gland removed. 5. Total thyroidectomy: If the pathological examination by frozen section confirms multiple thyroid adenomas, which have widely involved both lobes and the isthmus, total thyroidectomy should be used, but the isthmus should be preserved if it is normal. 6.Rective thyroidectomy: Radical excision of cervical lymph nodes on the same side of the thyroid gland (including isthmus) or total thyroidectomy should be performed at the same time or in stages, but the internal jugular vein and laryngeal nerve on one side should be preserved. If lymph node cancer in the neck is found to originate from the thyroid gland, radical thyroidectomy should be performed even though the thyroid symptoms and lesions are not obvious.