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Parsonage–Turner syndrome
Parsonage–Turner syndrome is also known as acute brachial neuropathy and acute brachial radiculitis. Other names used are Parsonage–Aldren–Turner syndrome, neuralgic amyotrophy, brachial neuritis, brachial plexus neuropathy, or brachial plexitis.
The syndrome is idiopathic; although many specific risk factors have been identified (such as; post-operatively, post-infectious, post-traumatic or post-vaccination) () the aetiology is still unknown. The condition manifests as a rare set of symptoms most likely resulting from autoimmune inflammation of unknown etiology of the brachial plexus. (The brachial plexus is a complex network of nerves through which impulses reach the arms, shoulders and chest.)
Parsonage-Turner syndrome has an incidence of 1.64 cases in 100,000 people ()
==Mechanism==
Parsonage-Turner involves neuropathy of the suprascapular nerve in 97% of cases, and variably involves the axillary and subscapular nerves. As such, the muscles usually involved are the supraspinatus and infraspinatus, which are both innervated by the suprascapular nerve. Involvement of the deltoid is more variable, as it is innervated by the axillary nerve.〔(【引用サイトリンク】author=Frank Gaillard MD )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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