Scleroderma is a group of rare autoimmune diseases that cause hardening and tightening of the skin and connective tissues. The name comes from two Greek words meaning hard skin. In this condition, your immune system mistakenly attacks healthy tissue, causing excess collagen production.
There are two main types of scleroderma. Localized scleroderma mainly affects the skin in patches or lines. Systemic scleroderma, also called systemic sclerosis, can affect internal organs like the lungs, heart, kidneys, and digestive system. Systemic forms range from limited to diffuse, depending on how much skin and how many organs are involved.
Scleroderma is considered a chronic connective tissue disease and classified as an autoimmune rheumatic condition. It affects about 300,000 people in the United States. Women are diagnosed more often than men, typically between ages 30 and 50. Early detection through blood testing helps doctors monitor disease progression and begin treatment sooner.