Synonyms
Lilac disease; Polymyositis with skin involvement
Definition
Dermatomyositis is a connective tissue disease characterized by inflammatory and degenerative changes of the muscles and skin. Dermatomyositis is one of the idiopathic inflammatory myopathies, a group of acquired skeletal muscle diseases that includes five subsets: classic or adult dermatomyositis (DM), polymyositis (PM), myositis with malignancy, juvenile dermatomyositis/polymyositis, and myositis overlapping with another collagen vascular disorder. Another subset called amyopathic dermatomyositis (ADM) or dermatomyositis sine myositis presenting with only skin involvement for at least 2 years since the diagnosis has been recently recognized. Although there is some overlap, these subsets are indeed heterogeneous both in terms of presentation and pathophysiology. Cutaneous involvement is the primary clinical feature distinguishing patients with DM from those with PM, and it may precede, accompany, or follow the...
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References and Further Reading
Callen, J. P., & Wortmann, R. L. (2006). Dermatomyositis. Clinics in Dermatology, 24, 363–373.
Krathen, M. S., Fiorentino, D., & Werth, V. P. (2008). Dermatomyositis. Current Directions in Autoimmunity, 10, 313–332.
Magro, C. M., Segal, J. P., Crowson, A. N., & Chadwick, P. (2010). The phenotypic profile of dermatomyositis and lupus erythematosus: A comparative analysis. Journal of Cutaneous Pathology, 37, 659–671.
Mammen, A. L. (2010). Dermatomyositis and polymyositis: Clinical presentation, autoantibodies, and pathogenesis. Annals of the New York Academy of Sciences, 1184, 134–153.
Smith, E. S., Hallman, J. R., DeLuca, A. M., Goldenberg, G., Jorizzo, J. L., & Sangueza, O. P. (2009). Dermatomyositis: A clinicopathological study of 40 patients. American Journal of Dermatopathology, 31, 61–67.
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Rongioletti, F., Montinari, M. (2016). Dermatomyositis. In: Massi, D. (eds) Dermatopathology. Encyclopedia of Pathology. Springer, Cham. https://doi.org/10.1007/978-3-319-30006-1_413
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DOI: https://doi.org/10.1007/978-3-319-30006-1_413
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