Hashimoto's Thyroiditis—Recognizing the Most Common Cause of Hashimoto's Thyroiditis, Symptoms, and Treatment

Hashimoto’s thyroiditis is an autoimmune disease that affects thyroid tissue. In autoimmune diseases, the immune system attacks healthy parts of the body instead of just harmful cells.

The cause of the disease lies in the body’s own immune system. It mistakenly attacks the thyroid tissue, thereby damaging it. This leads to chronic inflammation of the thyroid gland, which in turn results in hypothyroidism.

At the same time, Hashimoto’s is the most common form of thyroiditis. Women are about nine times more likely to develop Hashimoto’s thyroiditis than men. In most cases, the disease occurs between the ages of 40 and 50. Incidentally, the disease owes its exotic name to its discoverer—the Japanese physician Hakaru Hashimoto.

The location of the thyroid gland in the neck © SciePro | AdobeStock

The gradual destruction of thyroid tissue leads to hypothyroidism. Those affected experience the associated symptoms in very different ways. Some patients experience various symptoms even with mild hypothyroidism. Others remain symptom-free even when there are significant changes in the thyroid-stimulating hormone (TSH).

The disease usually begins insidiously and initially manifests as nonspecific symptoms. These can affect various areas:

• Metabolism and digestion: General feeling of being cold, rapid weight gain (even with little food intake), constipation 
• Energy and mental state: Fatigue, weakness, depressive moods
• Cardiovascular system: High blood pressure and slow heart rate
• Fertility: Impotence in men; menstrual cycle irregularities, reduced fertility, and a higher risk of miscarriage in women.

It is very rare for all of the listed symptoms to occur together in a single patient. Often, only a few symptoms are prominent.

Autoimmune diseases arise from errors in the body’s own immune system. Normally, the immune system fights only harmful viruses or bacteria. The immune system then produces antibodies against the invaders to neutralize them. The body’s immune system also becomes active when individual cells are severely damaged or infected and must therefore be eliminated.

In the case of an autoimmune disease, however, the body reacts against healthy, self-produced tissue. In Hashimoto’s disease, this tissue is the thyroid gland.

It is not yet known exactly why this immune system malfunction occurs. Researchers believe that a viral or bacterial infection may, under certain circumstances, trigger the autoimmune reaction.

What is certain, however, is that the predisposition to developing Hashimoto’s thyroiditis is genetically determined. As a result, relatives of patients with Hashimoto’s are affected more frequently than the general population.

Other triggers for Hashimoto’s disease may also include

• environmental factors,
• emotional stress, and
• an imbalance in iodine metabolism

.

Blood tests and imaging procedures are the best methods for diagnosing Hashimoto’s thyroiditis.

An ultrasound examination of the thyroid gland is painless and quick to perform. It can reveal early signs of the disease.

In the early stages, only minor changes in the thyroid’s tissue structure are visible. Over time, these changes become more pronounced due to the increasing accumulation of inflammatory cells.

An ultrasound examination of the thyroid gland can provide initial indications of Hashimoto’s disease © Kalim | AdobeStock

Antibodies in the Blood

Elevated levels of thyroid antibodies in the blood (TPO-AK, Tg-AK, TRAK) can usually be detected even before changes in thyroid function occur.

The immune system mistakenly produces so-called TPO antibodies. In addition, antibodies against thyroglobulin—a specific protein found in the thyroid gland—are often detected in the blood.

Hormones

The first sign of hypothyroidism is an increase in the TSH level in the blood.

There are specific reference ranges for interpreting TSH levels. A TSH level in the range of 2.0 to 3.0 is considered within the normal range, depending on the individual’s condition and symptoms. In cases of Hashimoto’s disease and hypothyroidism, the TSH level is usually significantly higher than this range if left untreated.

However, a slightly higher or lower TSH level may be the “comfort range” for some individuals. If you are trying to conceive, however, the TSH level should be lower and stabilize around 1.

The TSH test is therefore the most important test for detecting hypothyroidism.

Hashimoto’s disease is treated with medication. Tablets replace the thyroid hormones.

With proper medication management, many patients can achieve symptom relief. However, the more severe the hypothyroidism and the longer it persists, the more time is needed to achieve stable medication management.

Treatment for Hashimoto’s disease typically involves thyroxine (T4). This hormone is similar to the one released into the bloodstream by the thyroid gland itself. Thyroxine has virtually no effect on metabolism; rather, it serves as a reservoir and is slowly broken down by the body.

Various organs can use thyroxine to produce the necessary amount of the thyroid hormone triiodothyronine (T3). This hormone is essential for metabolism.

In many cases, Hashimoto’s disease is asymptomatic. The body is then able to maintain hormone levels for some time.

If the inflammation attacks the hormone stores in the thyroid gland, larger amounts of thyroid hormones can enter the bloodstream. This triggers hyperthyroidism.

As a result, the thyroid tissue sustains increasing damage, which further impairs its function. This leads to a drop in thyroid hormone levels, which in turn triggers symptoms of hypothyroidism.

Hashimoto’s thyroiditis is considered one of the most common causes of hypothyroidism in adults. To date, there is no cure for this condition. However, with proper medication management, many patients can achieve symptom-free lives and a life expectancy comparable to that of a healthy person.

Hashimoto’s thyroiditis is the most common form of autoimmune thyroiditis and is considered the most common cause of hypothyroidism. For people with Hashimoto’s thyroiditis, the disease is usually chronic, although its course varies from person to person. Clinically, typical symptoms as well as symptoms of hypothyroidism are present, which should be detected early. The diagnosis of Hashimoto’s thyroiditis is based primarily on the detection of TPO antibodies and the measurement of T3, T4, and triiodothyronine.

Over time, inflammation of the thyroid gland leads to either an enlargement or a shrinkage of the gland. Hashimoto’s thyroiditis is the most common cause of overt hypothyroidism and affects women more frequently than men. It is often associated with other conditions such as Graves’ disease, Addison’s disease, or type 1 diabetes mellitus. The term “Hashimoto’s thyroiditis” is named after the physician Hakaru Hashimoto, who first described this condition.

Treatment for Hashimoto’s thyroiditis typically involves medication with levothyroxine and is tailored to the patient’s current symptoms and test results. The treatment of choice is to correct the hormone deficiency, as causal treatment of the underlying process is not yet possible. Additionally, the use of selenium in Hashimoto’s thyroiditis is under discussion, particularly for some patients. Treatment for subclinical hypothyroidism is individualized, depending on symptoms and laboratory results.

Many people with Hashimoto’s thyroiditis experience nonspecific symptoms at the onset of the disease before further symptoms develop. Most people with Hashimoto’s thyroiditis can achieve a good quality of life with early diagnosis and consistent treatment. Regular monitoring is important, as Hashimoto’s thyroiditis causes long-term changes. Patients with Hashimoto’s thyroiditis should be closely monitored, as the disease can progress in different ways.

The diagnosis and treatment of Hashimoto’s thyroiditis are always based on individual factors. The incidence of Hashimoto’s thyroiditis indicates that it is a common condition. Overall, Hashimoto’s thyroiditis is the most common cause of hormonal dysfunction of the thyroid gland and should therefore be detected early.

What is Hashimoto’s thyroiditis?
Hashimoto’s thyroiditis is an autoimmune disorder of the thyroid gland in which the immune system attacks thyroid tissue. This often leads to hypothyroidism.

What are the symptoms of Hashimoto’s thyroiditis?
Typical symptoms include fatigue, weight gain, sensitivity to cold, and difficulty concentrating. These symptoms of hypothyroidism usually develop gradually.

How is Hashimoto’s diagnosed?
Hashimoto’s thyroiditis is diagnosed through blood tests that measure antibodies, TSH, and thyroid hormones. An ultrasound examination of the thyroid may also be performed.

How is Hashimoto’s thyroiditis treated?
Treatment for Hashimoto’s thyroiditis usually involves taking L-thyroxine to compensate for the hormone deficiency. The goal is to normalize thyroid hormone levels in the body.

Is Hashimoto’s curable?
Hashimoto’s thyroiditis is a chronic condition and cannot be cured. However, with the right treatment, the symptoms can be well controlled.