noun, Pathology.
any of a group of diseases, as systemic lupus erythematosus, polyarteritis, scleroderma, and rheumatoid arthritis, involving inflammation or degeneration of connective tissue and accompanied by deposition of fibrinous material.

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.


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  • Collagen fiber

    collagen fiber or collagenous fiber n. An individual scleroprotein fiber composed of fibrils and usually arranged in branching bundles of indefinite length. Also called white fiber.

  • Collagenic

    collagenic col·la·gen·ic (kŏl’ə-jěn’ĭk) adj. Collagenous.

  • Collagen injection

    noun 1. an injection of collagen into the lip in order to give it a fuller appearance

  • Collagenosis

    collagenosis col·lag·e·no·sis (kə-lāj’ə-nō’sĭs, kŏl’ə-jə-) n. See collagen disease.

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