Know how to use "fewer" and "less"? Find out.
collagen disease or collagen-vascular disease
Any of a group of diseases affecting connective tissue and often characterized by fibrinoid necrosis or vasculitis and including such diseases as lupus erythematosus, progressive systemic sclerosis, rheumatoid arthritis, rheumatic fever, polyarteritis nodosa, and dermatomyositis. Also called collagenosis.