Thyroid ca is a malignant tumor of the thyroid gland. It is a cancer of the cells inside the thyroid gland, which originates from the epithelial cells of the thyroid gland and accounts for 1.3% to 1.5% of all malignant tumors in the body. It accounts for 1.3% to 1.5% of all malignant tumors in the body and has a growing trend in recent years, and has become the entity tumor with the fastest increasing incidence. The incidence rate of thyroid ca in China has increased nearly 5 times in the past 10 years. The following is the specific introduction of thyroid cancer: thyroid cancer develops at the age of 40-50 years old, more in women than men. Except for medullary carcinoma, most of them originate from follicular epithelial cells, among which papillary carcinoma is the most common clinically and appears early with cervical lymph node metastasis, but the prognosis is better. Follicular carcinoma and medullary carcinoma are moderately malignant carcinomas and are prone to metastasis via blood transport. Undifferentiated carcinoma is the most malignant and has a poor prognosis. Patients with thyroid cancer often have no clinical symptoms and the tumor grows very slowly, so it is difficult to be detected in the early stage. It is usually found in the hospital after the discovery of neck lump, and some patients also realize local pressure symptoms and foreign body sensation, diarrhea, palpitation, low calcium and other symptoms. Thyroid ca is one of the malignant tumors, but it is not the same as other malignant tumors in human body. Most of the thyroid cancers have a good prognosis, some of them develop very slowly and do not affect the life expectancy. Therefore, patients with thyroid cancer should not be overly nervous and anxious, early detection and early treatment is the best.