Dermoid

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Dermoid

 

(dermoid cyst), a developmental defect—a sacciform tumor whose wall is structurally similar to skin, containing glands (chiefly sebaceous) and hairs. The cavity is filled with a thick lardlike mass. The dermoid is a kind of teratoma. Treatment is surgical.

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Bilateral ocular dermoids have been found in animals (Feist and Trefz 2011; Gelmetti et al.
The exact developmental mechanisms related to the pathogenesis of ocular dermoids have not yet been clarified (Barkyoumb and Leipold 1984).
Congenital ocular dermoid is less common in bovines and is rare in dogs.
Asymmetrical Ocular dermoid in native Korean cattle.
In the study, comparatively low prevalence of ocular dermoid was noticed among calves presented with congenital abnormalities.
Congenital ocular dermoid cyst in a river buffalo (Bubalus bubalis) calf.
ocular dermoids, corneal ulcer and mandibular fracture etc.
It was determined that ocular dermoids in Hereford cattle are a genetically transmitted defect, characteristic of autosomal recessive and polygenic inheritance that occur sporadically with no clear cut sex incidence (Backyoumbmand Leipold.
Detailed developmental mechanisms involved in pathogenesis of ocular dermoids are not clearly known (Gellatt, 1972).
Ocular dermoids are formed due to defective epidermal closure along embryonic fissures, which isolates an island of ectoderm in the dermis or subcutaneous and usually contains hair, keratin and sebum with progressive enlargement so that it becomes clinically apparent (Edwards, 2002).