Figure 1.

CD31 and LYVE-1 immunohistochemistry for normal human conjunctiva and pterygia. There was a small number of CD₃₁⁽⁺⁾LYVE-1⁽⁻⁾ blood vessels, but only a few CD₃₁⁽⁺⁾LYVE-1⁽⁺⁾ lymphatic vessels in normal epibulbar conjunctivae segments (a). Lymphatic vessels were moderately increased in primary pterygia (b), but were dramatically increased in recurrent pterygia (c) Footnote 1: CD₃₁ immunohistochemistry; Footnote 2: LYVE-1 immunohistochemistry; red arrows: lymphatic vessels; blue arrows: blood vessels. Magnification for immunohistochemistry × 100).