Dermoids which
are localized on the limbus and cornea are very unusual congenital tumors
from the group of choristomas. Choristomas are congenital
masses of tissues not normally present in the location in which they
are found. These lesions are present at birth and they occasionally
enlarge, especially at puberty. Most likely, tissue destined to become
skin is displaced to the surface of the eye during fetal development.Dermoids
can occur over the cornea, limbus or conjunctiva. They are
round or ovoid, yellowish white, solid vascularized and dome-like. They
can involve the central or entire cornea or form a ring around the circumference
of the limbus.
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