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Dermatomyositis
Dermatomyositis is one of a group of acquired muscle diseases called
inflammatory myopathies. The disease, which has a somewhat severe onset, affects both children and adults. Females are more
often affected than males.
Dermatomyositis is characterized by a rash accompanying, or more
often, preceding muscle weakness. The rash looks like patchy, bluish-purple discolorations on the face, neck, shoulders, upper
chest, elbows, knees, knuckles, and back. Some people may also develop calcium deposits, which appear as hard bumps under
the skin.
The most common symptom is muscle weakness, usually affecting the
muscles that are closest to the trunk of the body. Eventually, people have difficulty rising from a sitting position, climbing
stairs, lifting objects, or reaching overhead. In some cases, muscles further away from the trunk of the body may be affected
later in the course of the disease. Problems with swallowing (dysphagia) may occur. Occasionally, the muscles ache and are
tender to the touch. Affected individuals may also feel fatigue and discomfort and experience weight loss or a low-grade fever.
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