This is an up-to-date review on external environmental factors for adult-onset idiopathic inflammatory myopathies (IIMs). Environmental factors with suggestive evidence including ultraviolet radiation, smoking, infectious agents (viruses in particular), pollutants, medications (ie, statin) and vitamin D deficiency are discussed. We also discuss the potential implications of environmental factors in IIM development, identify current challenges, and provide insight into future investigations.
Keywords: Antisynthetase syndrome; Environmental factors; Idiopathic inflammatory myopathies; Infectious agents; Myositis; Pollutants; Smoking; Ultraviolet radiation.
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