Connective tissue disease

In medicine and rheumatology, connective tissue diseases are "a heterogeneous group of disorders, some hereditary, others acquired, characterized by abnormal structure or function of one or more of the elements of connective tissue, i.e., collagen, elastin, or the mucopolysaccharides."

Classification
Autoimmune disease Cartilage disease Collagen disease
 * Dermatomyositis
 * Systemic lupus erythematosus
 * Mixed connective tissue disease
 * Polymyalgia rheumatica
 * Rheumatoid arthritis
 * Sjogren's Syndrome
 * Scleroderma