Figure 1. WWOX expression in primary and recurrent pterygium. Immunohistochemical staining of WWOX expression in the head and body of primary and recurrent pterygium and the conjunctiva (n=8/group). A: WOX1 and B: p-WOX1 are highly expressed in the epithelial cells of the pterygium head, whereas they were less expressed in the body and the conjunctiva. WWOX expression is stronger in recurrent pterygia than in primary pterygia. Magnification: 400X. Bar=25 μm.