Which histologic findings are characteristic of ocular rosacea?

Updated: Mar 03, 2020
  • Author: Jitander Dudee, MD, MA(Cantab), FACS, FRCOphth; Chief Editor: Edsel Ing, MD, MPH, FRCSC  more...
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The conjunctiva in ocular rosacea is infiltrated by inflammatory cells, T-helper/T-suppressor (CD4) cells, phagocytic cells, and antigen-presenting cells. In addition, increased vascular dilation and occasionally granulomatous changes are present. None of these changes are specific for rosacea.

Patients with rosacea typically have a mean increase of nearly all cell types, but especially T-helper cells.

Hoang-Xuan et al demonstrated a 3.5-fold increase in the ratio of CD4 cells to CD8 cells in the conjunctiva of patients with rosacea, most resembling a type IV hypersensitivity reaction. [20]

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