How to treat thyroid nodules?

Written by Hu Jian Zhuo
Nephrology and Endocrinology
Updated on September 03, 2024
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Clinically, if a thyroid nodule is confirmed to be a benign tumor, generally speaking, if thyroid function is normal and the nodule is not large, urgent treatment is not necessary, and regular follow-up is sufficient. If the thyroid nodule significantly enlarges, causing compression of the trachea or nerves, surgery should be considered. Furthermore, for ectopic growth of thyroid tissue behind the sternum, surgical removal is also considered necessary. Another scenario that requires special mention is if a thyroid nodule grows rapidly in a short period and ultrasound suggests calcification or bleeding within the cyst, thyroid cancer should be suspected. In this case, it's advisable to have the nodule surgically removed.

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Written by Hu Jian Zhuo
Nephrology and Endocrinology
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Symptoms of thyroid nodules

Thyroid nodules in the early stages often show no clear symptoms, with only small nodules appearing within the body. The size of these nodules can range from several millimeters to several centimeters, and their texture is generally slightly harder compared to the surrounding glandular tissue. When the enlargement is more noticeable, the nodule can move up and down with the thyroid gland during swallowing. In addition to the presence of nodules, when the thyroid nodule is prominent, it can compress the trachea, leading to difficulty breathing and irritative dry cough. If it compresses the recurrent laryngeal nerve, it may cause hoarseness, varying degrees of hoarseness, and even an inability to speak loudly. In patients with malignant nodules, the invasive malignant cells can cause symptoms such as hoarseness, difficulty breathing, dysphagia (difficulty swallowing), diarrhea, palpitations, facial flushing, and decreased blood calcium levels. If these symptoms occur, it is crucial to seek medical attention promptly.

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Differentiation between benign and malignant thyroid nodules

Generally speaking, whether benign or malignant, thyroid nodules show blood flow signals. For benign nodules, blood flow signals can be seen around the perimeter, with internal blood flow no different from normal thyroid tissue. In such cases, the nodules are typically diagnosed as thyroid adenomas, and they usually appear round or oval in shape with a uniformly echoic internal substance. If liquefaction occurs, mixed or cystic changes can appear; the tumor’s capsule tends to be intact, with clear boundaries. If a nodule has abundant internal blood flow with disorganized vessel distribution and high flow velocity, showing a high-resistance flow pattern, and has relatively less peripheral blood flow, it generally needs to be assessed for thyroid cancer. These nodules are often hypoechoic with irregular shapes, and the ratio of their longitudinal to transverse diameter is greater than 1. They have unclear boundaries, lack a capsule, and have no halo. In typical cases, microcalcifications like sand grains can also be observed. From the above analysis, we can see that the blood flow signals in thyroid nodules are complicated and reflect the extent of the nodular pathology. These signals can help in differentiating benign from malignant nodules, but when a rich and disorganized blood flow is observed, the nodule is more likely to be malignant.

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Probability of thyroid nodules becoming cancerous

The malignant manifestation of thyroid nodules is thyroid cancer. Thus, thyroid nodules are divided into two major categories: benign and malignant. Benign nodules generally make up the vast majority, with malignancies accounting for less than 5%. Malignant thyroid nodules are cancerous. Some benign thyroid nodules may also become malignant over time. Generally, small nodules do not show obvious clinical symptoms during the cancerous transformation, but their nature changes. When a nodule compresses surrounding tissues and causes certain symptoms, such as hoarseness, tracheal compression, and difficulty swallowing, it often indicates that the tumor is in the middle or late stage. Overall, the chances of benign nodules becoming cancerous are very small. The malignancy rate of benign nodular goiter is about 5%, and the possibility of adenomas turning malignant is around 10%. As the diameter increases, the possibility of adenomas becoming malignant gradually increases. There are several high-risk factors for the malignant transformation of thyroid nodules: for instance, having a history of radiation exposure to the head and neck area during childhood or adolescence, patients who are younger than 14 or older than 70; the rate of malignant transformation of thyroid nodules significantly increases; and the rate of malignant transformation in male nodules is significantly higher than in females. Also, patients whose nodules significantly increase in size in a short period during regular check-ups are also considered high-risk for malignancy.

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Should thyroid nodules be punctured?

Thyroid fine needle aspiration is a reliable and highly valuable diagnostic method we use to distinguish between benign and malignant thyroid nodules. Generally, thyroid nodules with a diameter >1 cm are considered for fine needle aspiration. Fine needle aspiration is not routinely considered in the following situations: (1) The nodule has already been evaluated with a nuclear scan indicating a hyperfunctioning adenoma due to hyperthyroidism; (2) The nodule is purely cystic; (3) The nodule is highly suspected to be highly malignant. In cases where the nodules grow rapidly and significantly enlarge, causing compression of the surrounding trachea and symptoms such as breathing difficulties and hoarseness, these thyroid nodules requiring surgery do not necessitate further fine needle aspiration treatment.

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What should I eat for thyroid nodules to dissipate?

Traditional Chinese Medicine (TCM) believes that thyroid nodules are mainly caused by emotional distress, dietary imbalances, and environmental maladjustment. Long-term emotions such as anger and depression can lead to stagnation of qi (vital energy), resulting in liver qi dysfunction and the formation of phlegm. Qi stagnation and phlegm accumulation in the front of the neck lead to the formation of this goiter. Therefore, the treatment for this condition often involves the use of foods or medications that soften hardness, disperse nodules, reduce swelling, and resolve stasis. For example, purslane, loofah, plums, and dried figs are some of the foods that can clear heat, facilitate diuresis, reduce swelling, and disperse nodules. Appropriate consumption of these foods can be beneficial in slowing the progression of the disease. However, it is generally difficult to dissolve nodules through diet alone, and active treatment is still necessary.