For the clinical diagnosis of thyroid cancer, thyroid nodules should be found first, and then in the next step of the diagnostic process, such as doing ultrasound imaging to find out the histological grading of 4 or more, maybe 4A, 4B or 4C. The diagnosis of thyroid cancer is still based on the diagnostic process of thyroid nodules, for example, if thyroid nodules are found, ultrasound can be done to find out the grading and staging of the nodules are, which is the general The initial screening. If the nodule is graded to grade 4 or higher, in cases where the histologic type is unknown, it may be necessary to consider a fine needle aspiration to further confirm the diagnosis of benign or malignant. Often, many thyroid patients have normal thyroid function, but normal thyroid function does not mean that the thyroid tissue is benign. In patients with thyroid cancer, the tissue is locally cancerous, but most normal thyroid tissue cells have normal secretory function, so thyroid function can be normal. If thyroid cancer has been clinically considered, the patient may undergo surgery. The surgical plan is usually chosen based on the size of the nodule and the condition of the lymph nodes in the neck. In addition to complete removal of the tumor, the surgery may also involve lymph node dissection in the neck.