Cutaneous biopsies of the eyelid did not demonstrate an increase in the total number of blood vessels. However, the vascular abnormalities that are typical of ocular rosacea represent activated, inflamed vessels, and these phenomena may be mediated by intercellular adhesion molecule and CD105. Furthermore, the strong correlations between toll-like receptor-4 and each vascular marker suggest that the innate immune system may govern the cutaneous effects of ocular rosacea. Intercellular adhesion molecule, CD105, and toll-like receptor-4 may represent important therapeutic targets in the management of this disease.
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