What is the pathology of thyroid?
The most common cause of hypothyroidism is disease of the thyroid itself, primary hypothyroidism. The most common cause of primary hypothyroidism is chronic autoimmune thyroiditis (Hashimoto’s disease), in which the thyroid is destroyed by antibodies or lymphocytes that attack the gland.
What are the three main classifications of thyroid diseases?
Thus, the disease is classified in the three functional states: hyper-eu-hypothyroidism….
- Hyperthyroid goiter with thyroid-associated ophthalmopathy or Basedow-Graves’ diseased
- Multinodular hyperthyroid goiter or Plummer’s disease.
- Autonomous nodule (hyperthyroid)
What pathologies are associated with hyperthyroidism?
This may occur for a number of reasons, including:
- Graves’ disease. Graves’ disease is an autoimmune disorder in which antibodies produced by your immune system stimulate your thyroid to produce too much T4.
- Hyperfunctioning thyroid nodules (toxic adenoma, toxic multinodular goiter or Plummer’s disease).
- Thyroiditis.
What is the pathogenesis of hyperthyroidism?
Pathophysiology of Hyperthyroidism In hyperthyroidism, serum T3 usually increases more than does T4, probably because of increased secretion of T3 as well as conversion of T4 to T3 in peripheral tissues. In some patients, only T3 is elevated (T3 toxicosis).
What is pathophysiology of hyperthyroidism?
Pathophysiology. The pathophysiology of hyperthyroidism depends on the particular variant of hyperthyroidism. In the case of Graves disease, the underlying cause is autoimmune, particularly the production of thyroid-stimulating immunoglobulins that bind to the TSH receptor and mimic the effects of TSH.
What is the pathophysiology of hypothyroidism?
Pathophysiology. The most common cause of hypothyroidism is the inability of the thyroid gland to produce a sufficient amount of thyroid hormone; however, less commonly pituitary and hypothalamus may also result in thyroid dysfunction.
What is the pathogenesis of hypothyroidism?
What is the most common cause of hyperthyroidism?
Graves’ disease, the most common cause of hyperthyroidism, is an autoimmune disorder. With this disease, your immune system attacks the thyroid and causes it to make too much thyroid hormone.
What is the pathophysiology of a goiter?
Pathophysiology of Diffuse Nontoxic Goiter The increased TSH causes increased cellularity and hyperplasia of the thyroid gland. The thyroid follicular cells are stimulated and contribute to follicular hyperplasia and thyroid enlargement.
What is iatrogenic hypothyroidism?
Inadequate secretion of thyroid hormone by the thyroid gland due to treatments that include medications (such as amiodarone), radioactive iodine ablation of the gland, or surgical excision of the thyroid. See also: hypothyroidism.
What is iatrogenic hyperthyroidism?
Hyperthyroidism can also be caused by taking too much thyroid hormone medicine for hypothyroidism. This is called factitious hyperthyroidism. When this occurs because the prescribed dosage of hormone medicine is too high, it is called iatrogenic, or doctor-induced, hyperthyroidism. This is common.
What is exogenous hyperthyroidism?
Exogenous hyperthyroidism is the term used to describe hyperthyroidism caused by ingestion of excessive amounts of thyroid hormone. It may be intentional (ie, suppressive doses of thyroxine to treat thyroid cancer) or inadvertent (ie, contamination of dietary supplements).