This information is provided by the National Institutes of Health (NIH) Genetic and Rare Diseases Information Center (GARD).
Parsonage Turner syndrome (PTS) is characterized by the sudden onset of shoulder and upper arm pain followed by progressive (worsening over time) weakness and/or atrophy of the affected area. The pain is felt along the path of one or more nerves and often has no obvious physical cause. The network of nerves involved in this syndrome is called the brachial plexus and it controls movement and sensation in the shoulders and arms. The cause is still unknown (idiopathic). However, researchers believe that most cases are due to an autoimmune response following exposure to an illness or environmental factor. Suspected triggers include viral and bacterial infections, surgery, vaccinations, injury, childbirth, strenuous exercise, certain medical procedures, and various health conditions. Treatment is symptomatic and may include pain relievers, corticosteroids and physical therapy.
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