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The most common cause is thyroid carcinoma, a malignant tumor. Signs include weight loss, increased appetite, and enlargement of the thyroid gland. [100] Hypothyroidism is the most common endocrine disease in dogs. It can be caused by autoimmune destruction (lymphocytic thyroiditis) or idiopathic atrophy of the thyroid gland. [101]
Hypothyroidism (also called underactive thyroid, low thyroid or hypothyreosis) is a disorder of the endocrine system in which the thyroid gland does not produce enough thyroid hormones. [3] It can cause a number of symptoms, such as poor ability to tolerate cold , extreme fatigue, muscle aches , constipation , slow heart rate , depression , and ...
Cushing's syndrome in a dog. The enlarged abdominal circumference due to increased fat storage in the abdominal cavity is conspicuous. Canine Cushing's syndrome - named after Harvey Cushing, who first described disease in humans - or canine hyperadrenocorticism (from ancient Greek ὑπέρ hyper, and Latin cortex adrenalis adrenal cortex) is a common hormonal disease of the domestic dog ...
Hyperthyroidism is the condition that occurs due to excessive production of thyroid hormones by the thyroid gland. [ 3] Thyrotoxicosis is the condition that occurs due to excessive thyroid hormone of any cause and therefore includes hyperthyroidism. [ 3] Some, however, use the terms interchangeably. [ 5]
A goiter is a diffuse, often symmetric, swelling of the thyroid gland visible in the anterior neck that may develop. [ 18] The thyroid gland may become firm, large, and lobulated in Hashimoto's thyroiditis, but changes in the thyroid can also be nonpalpable. [ 19] Enlargement of the thyroid is due to lymphocytic infiltration and fibrosis ...
The human thyroid (tan), as viewed from the front; and arteries (red) supplying the gland. The thyroid gland is a butterfly-shaped gland located in the neck below the Adam's apple. The thyroid, or thyroid gland, is an endocrine gland in vertebrates. In humans, it is in the neck and consists of two connected lobes.
Thyroid disease is a medical condition that affects the function of the thyroid gland. The thyroid gland is located at the front of the neck and produces thyroid hormones [ 1] that travel through the blood to help regulate many other organs, meaning that it is an endocrine organ. These hormones normally act in the body to regulate energy use ...
Most hypotheses surrounding the origin of Necturus's lack of metamorphosis concern the effectiveness of the thyroid gland. The thyroid gland in some salamanders, like the axolotl , produce normal thyroid hormones (THs), but cells in the organism express thyroid hormone receptors (TR) that are mutated, and do not bond correctly with thyroid ...