Dermatomyositis is connective-tissue disease that is characterized by inflammation of the muscles and the skin. Its cause is unknown, but it may result from either a viral infection or an autoimmune reaction.

X-ray findings include dystrophic calcifications in the muscles.

There is a form of this disorder that strikes children, known as juvenile dermatomyositis.

External links

• The American College of Rheumatology's patient education page on myopathy