In recent years, it has been found that the node changes in the thyroid are more common than diffuse and in most cases are not dangerous. But at the same time the nodes can increase in size to compress the surrounding organs and tissues as well as malignant - regenerate into malignant tumors. True to the last complication is more common for single (solitary) nodes.
What multinodular goiter of the thyroid gland and the reasons for its development
Multinodular goiter is characterized by multiple nodes in the thyroid gland. Usually such formations are euthyroid (normal thyroid function) character are called multisite euthyroid goiter (IES), and are more common in women than in men.
The disease is based environmental iodine deficiency in the diet, and water or its inadequate absorption in the patient. The latter may be due to the nature of the power (many soybean, turnip, swede, cabbage) or gastro-intestinal tract and liver.
This deficiency of iodine the thyroid gland produces enough thyroid hormone, it causes the pituitary to produce large amounts of their thyroid stimulating hormone (TSH), thyroid stimulating. Influenced TTG begins proliferation (growth) of cells of the thyroid gland and increase in final volume.
If the body's need for thyroid hormone decreases, the iron accumulates and forms large colloid goiter with large follicles filled with colloid (bubbles). Then the need for thyroid hormone increases again and the breast tissue grows. The alternation of these processes for a number of years and causes the formation of multinodular goiter.
Symptoms
If there are no violations of the thyroid gland and increase its expression, the disease is asymptomatic. But while such complications can develop as a significant increase in thyroid
Increase in thyroid - that underlies the disease
by compression of the surrounding organs, tissues, blood vessels and nerves, as well as the development of hyperthyroidism (increased content of the toxic effects of thyroid hormones in the blood) many years after the occurrence of multinodular euthyroid goiter. The last complication was named the functional autonomy of the thyroid gland (thyroid FA), as related to the independent of pituitary TSH capture of iodine and formation of thyroxine
Thyroxine - the main thyroid hormone
(T4) cells thyroid nodule thyrocytes.
These nodes are called "hot", they are identified in the study, radioisotope thyroid with radioactive iodine. "Hot" nodes produce much thyroid hormone
Thyroid hormones: mechanism of action and physiological effects
That leads to suppression of pituitary TSH secretion and reduce the remaining functioning thyroid tissue. Most are independently operating units appear in elderly people with multinodular goiter. Very often this pathology occurs in areas of iodine deficiency in food and water.
Diagnostics
Multinodular goiter (if it is large enough to deform the neck) can be detected by the patient, and can be a random finding at baseline medical examination or during ultrasonography (USG).
After identifying goiter patient carefully examined. To do this, take a blood on hormones (revealed the relationship between thyroid hormone and pituitary TSH, which speaks volumes specialist) conducted thyroid ultrasound
Thyroid ultrasound - to examine the evidence
(nodes are identified, their location and structure). Spend fence as content nodes using fine-needle aspiration biopsy (FNA) under the control of the ultrasonic beam, followed by laboratory cytology (studied cells found in punctate) exploration and definition of the nature of the node (cyst, benign or malignant tumors, and so on).
Of great importance is also scintigraphy - a study of the thyroid gland using radioactive iodine. This study identifies the "hot" (ie, releasing more hormones than the remaining thyroid tissue) and "cold" (non-functioning) components, which, according to many researchers, the most prone to degenerate into a malignant tumor. In what could be done as magnetic resonance imaging, which allows you to examine in detail the structure of the nodes.
The studies carried out assessment of multinodular goiter and its progression with the development of compression of the surrounding tissues or thyrotoxicosis. If the doctor sees that the disease progresses, goiter removed surgically. When non-operation and does not increase in the size of the crop for the sick just watching.
Galina Romanenko