Scleroderma (SSc) is a rare but progressive autoimmune disease that mainly affects women between the ages of 20 and 50, although men and children can also develop the disease. Many patients who have scleroderma also develop pulmonary arterial hypertension (PAH). Find out more:
1. According to the Scleroderma Foundation, there are an estimated 300,000 scleroderma patients in the U.S.