To confirm the diagnosis of follicular thyroid cancer, the doctor will first conduct a brief physical examination and take a medical history, which will be supplemented by ultrasound serology tests. Based on the status of the nodule on the ultrasound, it can be roughly determined whether the nodule is benign or malignant. For example, a nodule with calcified foci, unclear margins, and an aspect ratio greater than 1, with obvious blood flow signals, would be highly suspected to be a thyroid cancer. Another condition is that the lesion is growing rapidly. For patients with suspected thyroid cancer, a cytological puncture is usually recommended. A cytologic aspiration before surgery should detect 95% of them. Of course, the most reliable way is to do a rapid intraoperative biopsy of the thyroid pathology. The most accurate is the routine pathological examination after surgery, which can also be diagnosed in this group of patients.