Papillary thyroid cancer is one of the pathologic types of thyroid cancer, the development of which is related to radiation, heredity and other factors, 4.3*4.8*5mm refers to the size of the cancerous foci. Thyroid cancer can be divided into four types according to pathological types: papillary carcinoma, follicular adenocarcinoma, medullary carcinoma, and undifferentiated carcinoma. Among them, papillary carcinoma is the most dominant type, which is well differentiated, less malignant and has a better prognosis. Papillary thyroid carcinoma is most common in women aged 30-45 years old, and its occurrence is related to the history of radiation exposure to the neck, genetic factors, and BRAF gene mutation. 4.3*4.8*5mm describes the size of papillary carcinoma lesion, which indicates that the lesion is small, and according to the staging, the primary lesion is T1a stage (lesion ≤1cm and within the thyroid gland). The prognosis of papillary thyroid cancer is good, and patients are advised to consult the doctor in time and treat it actively.