pterygium
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.
MONDO:0006105
benign conjunctival neoplasm
is_a
MONDO:0021452
benign neoplasm of cornea
is_a
MONDO:0100581
ocular growth disorder
is_a
pterygium of conjunctiva and cornea
exact