Pterygium refers to any winglike triangular membrane occurring in the neck, eyes, knees, elbows, ankles or digits.The term comes from the Greek word pterygion meaning 'wing'.
Popliteal pterygium syndrome, which affects the legs.
Pterygium (conjunctiva)A pterygium grows in response to exposure to ultraviolet light. They are more common in light-skinned people living nearer the equator, particularly where outdoor activities are popular.
As the pterygium grows, it replaces the corneal epithelium, and ...
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