What is a group of rare diseases that cause abnormal growth of the body's connective tissue? a. acne b. scleroderma c. osteoarthritis d. psoriasis

Vasculitis can involve any of the blood vessels. Mixed connective tissue disease. People with MCTD have some features characteristic of several diseases, including lupus, scleroderma, polymyositis or dermatomyositis, and rheumatoid arthritis.

So,

B- Scleroderma

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