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Idiopathic inflammatory myopathies including polymyositis and dermatomyositis 

Idiopathic inflammatory myopathies including polymyositis and dermatomyositis
Idiopathic inflammatory myopathies including polymyositis and dermatomyositis

Gavin Clunie

, Nick Wilkinson

, Elena Nikiphorou

, and Deepak R. Jadon

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date: 27 June 2022

This chapter explores the epidemiology and pathophysiology of idiopathic inflammatory myopathies. The chapter takes a focus on polymyositis and dermatomyositis and describes relevant diagnostic criteria, clinical presentations, investigations, and therapeutic options. Other inflammatory myopathies discussed include inclusion-body myositis and other (adult) inflammatory myopathies such as those induced by drugs. The chapter closes with a description of juvenile idiopathic inflammatory myopathies, a heterogeneous group of inflammatory muscle conditions affecting young people and consisting of juvenile dermatomyositis and amyopathic juvenile dermatomyositis among others.

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