For a description of systemic lupus erythematosus refer to Chapter 8. Juvenile Dermatomyositis and Polymyositis
In children and young people, chronic idiopathic inflammatory myositis is a relatively heterogeneous disorder, where other components of collagen vascular disorders may emerge over time (45). In contrast, adults can be placed in specific subsets of inflammatory myopathy on the basis of clinical, immunological, and epidemiological features. A bimodal distribution for the onset of polymyositis and dermatomyositis has been suggested with a peak in the 5- to 9-year old and 55- to 59-year-old range (46). The disease occurs at least 1.5 times more frequently in females than males in the Western world (7,8,46,47). The ratio is reversed in Japanese and Saudi Arabian studies (48,49), and differs in children and adults (8,48). Inflammatory myositis occurs more frequently in African-American females than in Caucasians, although racial differences are less marked in children (8,46).
Juvenile dermatomyositis (JDM) differs in many aspects from the disease observed in adults, as summarized in Table 4.
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Rosacea and Eczema are two skin conditions that are fairly commonly found throughout the world. Each of them is characterized by different features, and can be both discomfiting as well as result in undesirable appearance features. In a nutshell, theyre problems that many would want to deal with.