NCIt synonyms : Pterygium of Conjunctiva and Cornea;
NCIt definition : A wedge-shaped fibrovascular lesion arising from the bulbar conjunctiva and extending
to the cornea. It is caused by chronic exposure to solar ultraviolet radiation, heat,
and dust. It may cause severe vision loss. Studies have linked pterygium to neoplastic
proliferation and suggest that it may be a stem cell disorder.;