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Polymyositis and the associated inflammatory myopathies have an associated increased risk of cancer. [3] The features they found associated with an increased risk of cancer were older age, age greater than 45, male sex, difficulty swallowing, death of skin cells, cutaneous vasculitis, rapid onset of myositis (<4 weeks), elevated creatine kinase, higher erythrocyte sedimentation rate and higher ...
Infection - The most common infectious cause of myositis is viral infections, such as the common cold. [4] Other viruses, such as COVID-19, are also shown to be a rare cause of myositis. [6] Benign acute childhood myositis has been described in children after prodromal viral infections with different viral agents.
Around 3.2 children per million per year are diagnosed with DM (termed juvenile dermatomyositis), with an average age of onset of seven years. Diagnosis of adult DM commonly occurs between 30 and 50 years of age. PM is an adult disease, usually emerging after the age of twenty.
Complications may include calcium deposits in muscles or skin. [1] The cause is unknown. [1] Theories include that it is an autoimmune disease or a result of a viral infection. [1] Dermatomyositis may develop as a paraneoplastic syndrome associated with several forms of malignancy. [4] It is a type of inflammatory myopathy. [1]
Polymyositis produces muscle weakness. It can often be treated by drugs like corticosteroids or immunosuppressants. Inclusion body myositis is a slowly progressive disease that produces weakness of hand grip and straightening of the knees. No effective treatment is known. (M60.9) Benign acute childhood myositis
IBM is often confused with (misdiagnosed as) polymyositis. Polymyositis that does not respond to treatment is likely IBM. [35] Dermatomyositis shares a number of similar physical symptoms and histopathological traits as polymyositis, but exhibits a skin rash not seen in polymyositis or sIBM. It may have different root causes unrelated to either ...
It manifests itself in children; it is the pediatric counterpart of dermatomyositis. In JDM, the body's immune system attacks blood vessels throughout the body, causing inflammation called vasculitis. In the United States, the incidence rate of JDMS is approximately 2-3 cases per million children per year. The UK incidence is believed to be ...
Childhood arthritis (juvenile arthritis or pediatric rheumatic disease) is an umbrella term used to describe any rheumatic disease or chronic arthritis-related condition which affects individuals under the age of 16. There are several subtypes that differentiate themselves via prognosis, complications, and treatments.