Scleroderma is a poorly understood illness that causes widespread hardening of the skin, especially on the hands and face. It also can damage the lungs, heart, kidneys, digestive tract, muscles and joints. It is a long-lasting (chronic) autoimmune disorder, an illness in which the body's immune defenses mistakenly attack the body's own cells rather than protecting them from outside invaders. Scleroderma also is called progressive systemic sclerosis.
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