What does it mean for a thyroid nodule to be classified as Category 3?
Jul 07, 2025
Source: Cainiu Health
Dr. Yang Chuanjia
Introduction
Thyroid nodules categorized as Class 3 are mostly benign. These nodules typically have well-defined margins, regular shape, a纵横比 (antiparallel ratio) less than 1, no calcification or only coarse calcifications, and normal blood flow signals. Patients generally experience no significant discomfort or noticeable impact on thyroid function. In most cases, no specific treatment is required, and regular follow-up ultrasound examinations to monitor changes in the nodule are sufficient.
Generally speaking, thyroid nodules categorized as Class 3 refer to a type of nodule determined by TI-RADS classification after ultrasound examination, which are considered likely to be benign with a low risk of malignancy. If any abnormalities are detected, timely medical consultation is recommended. Detailed analysis is as follows:
Class 3 thyroid nodules are mostly benign lesions. These nodules typically exhibit clear boundaries, regular shape, a纵横比 (antiparallel/parallel ratio) less than 1, no calcifications or only coarse calcifications, and normal blood flow signals. Patients generally experience no obvious discomfort or significant impact on thyroid function. In most cases, no specific treatment is required, and regular ultrasound follow-ups to monitor nodule changes are sufficient, as the risk of malignancy is generally low.
A small number of Class 3 thyroid nodules may carry a risk of malignancy. Although the overall malignancy rate is low, attention should be paid if the nodule shows a significant increase in size over a short period or if subtle changes appear in ultrasound features, such as blurred margins or microcalcifications within the nodule. In such cases, it is necessary to follow medical advice to increase the frequency of follow-up examinations or undergo further tests such as fine-needle aspiration biopsy to rule out the possibility of malignancy.
Upon detection of a Class 3 thyroid nodule, individuals should maintain a calm mindset, follow the doctor's recommendations for regular ultrasound follow-ups, and avoid excessive anxiety or neglecting follow-up monitoring.
