If the thyroid nodule is 1.7 cm, further examination is needed. First, the nodule should be graded by TI-RADS according to the ultrasound results. If the nodule is graded as grade 3 or below, it can be followed up for observation. If the nodule is malignant, surgery should be performed as soon as possible. If the nodule is benign, the patient can continue to be monitored and the ultrasound of the neck can be repeated every 6 months to a year. hospitalization for surgery.