Thyroid nodules with a horizontal to vertical ratio greater than one is one of the manifestations of cancer, but cannot be used to diagnose cancer. It is mostly used to indicate suspected malignancy or cancerous tendency. Through the neck ultrasound, you can see the horizontal and vertical diameter of the thyroid nodule, and the general experience is that the horizontal to vertical ratio is greater than one for malignant tendency, while the horizontal to vertical ratio is less than for benign tendency. However, this method of judgment is not necessarily accurate, ultrasound to see thyroid nodules horizontal and vertical ratio is greater than one is not necessarily cancer, but also need to be based on the thyroid nodule border is clear, whether there is blood flow signal and so on further judgment. If there is a high suspicion of malignant tendency of thyroid nodule, it can be determined by puncture biopsy or pathological examination after surgical resection. All other judgments without pathological examination can only be suspected, and only pathological examination can really determine whether it is malignant or benign. Due to the rich blood flow in the thyroid area, the probability of nodule hyperplasia is higher, so you can regularly carry out thyroid function and color ultrasound examination. If there is any abnormality, take appropriate measures to treat it in time.