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The prevalence of systemic scleroderma is estimated to range from 50 to 300 cases per 1 million people. For reasons that are unknown, women are four times more likely to develop the condition than men.

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Raynaud Phenomenon Raynaud's phenomenon is a vessel abnormality caused by overactivity of smooth muscle in the wall of arteries, causing contractions, or vasospasms, of the small ...learn more >>

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