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Also known as hyperthyroid myopathy, TM is one of many myopathies that lead to muscle weakness and muscle tissue breakdown. Evidence indicates the onset may be caused by hyperthyroidism . [ 1 ] Physical symptoms of TM may include muscle weakness , the breakdown of muscle tissue, fatigue , and heat intolerance . [ 2 ]
After several case reports in the 18th and 19th centuries, periodic paralysis was first described in full by the German neurologist Karl Friedrich Otto Westphal (1833–1890) in 1885. [ 7 ] [ 8 ] In 1926 the Japanese physician Tetsushiro Shinosaki, from Fukuoka , observed the high rate of thyroid disease in Japanese people with periodic paralysis.
Regardless of the inconsistent findings, a 2007 study by Andersen et al. states that the distinction between sub-clinical and overt thyroid disease is in any case somewhat arbitrary. [55] Sub-clinical hyperthyroidism has been reported in 63% of euthyroid Graves' disease, [56] but only in 4% of cases where Graves' disease was in remission. [57]
Thyrotoxicosis factitia (alimentary thyrotoxicosis, exogenous thyrotoxicosis) [1] [2] is a condition of thyrotoxicosis caused by the ingestion [3] of exogenous thyroid hormone. [4] [5] It can be the result of mistaken ingestion of excess drugs, such as levothyroxine [6] and triiodothyronine, [7] or as a symptom of Munchausen syndrome.
Toxic multinodular goiter (TMNG), also known as multinodular toxic goiter (MNTG), is an active multinodular goiter associated with hyperthyroidism.. It is a common cause of hyperthyroidism [2] [3] in which there is excess production of thyroid hormones from functionally autonomous thyroid nodules, which do not require stimulation from thyroid stimulating hormone (TSH).
Hyperthyroidism may be asymptomatic or present with significant symptoms. [2] Some of the symptoms of hyperthyroidism include nervousness, irritability, increased perspiration, heart racing, hand tremors, anxiety, trouble sleeping, thinning of the skin, fine brittle hair, and muscular weakness—especially in the upper arms and thighs. More ...
Cachexia is a possible symptom in hyperthyroid cats but due to improved screening and diagnostics it is less common for a cat to become cachectic before starting treatment. [2] Ventroflexion of the head is a rare symptom observed in hyperthyroid cats but the last case report is from 1994. Due to the rarity the pathogenesis behind this is not known.
Many of these individuals have underlying primary causes of hyperthyroidism (Graves' disease, toxic multi-nodular goiter, solitary toxic adenoma, or amiodarone). However, thyroid storm can occur in individuals with unrecognized thyrotoxicosis experiencing non-thyroid surgery, labor, infection, or exposure to certain medications and ...