The staging of papillary thyroid cancer is a little different from other tumors, it has an age stage. If the lesion is only confined to the neck, we call it stage I. If there is distant metastasis, lung metastasis or bone metastasis, this is a stage II patient, before 45 years old, why? Even if you have bone metastasis or lung metastasis, this patient can still survive for a long time, so we classify him as stage II. But if the patient reaches 45 years old, the staging changes, because the older the patient is, the worse the treatment effect is generally. A lymph node metastasis is a stage 3 patient. If there are distant metastases, such as bone metastases and lung metastases, it is stage IV. Therefore, we should know that the staging of papillary carcinoma is indeed a little different from other tumors.