ISSN 2398-2993      

Ocular dermoid cysts

obovis

Introduction

  • Uncommon, congenital masses of normal tissue growing in an abnormal site, such as skin tissue growing in/on the eye.
  • May involve cornea, conjunctiva, third eyelid or eyelids. May be bilateral.
  • Cause: often unknown.
  • Signs: mass on/near eye, blepharospasm, lacrimation, visual impairment. Variable pigmentation and hairs may be present.
  • Diagnosis: clinical signs +/-biopsy and histopathology.
  • Treatment: surgical removal.
  • Prognosis: variable.

Pathogenesis

Etiology

  • Etiology is often unknown, but presumed to be due to defects in embryogenesis where elements of disordered dermal/epidermal tissue become entrapped within the cornea, conjunctiva, etc.
  • Ocular dermoids have been found to be a genetically transmitted defect in Hereford cattle. Researchers found characteristics of autosomal recessive and polygenic inheritance.

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed Papers

  • Recent references from PubMed and VetMedResource.
  • Rashmi P T & Priya Singh P (2018) Surgical management of dermoid cyst in a crossbred calf. J Entomol Zool 6 (2), 2574-2576 EntomolJ.
  • Barkyoumb S D & Leipold H W (1984) Nature and cause of bilateral ocular dermoids in Hereford cattle. Vet Pathol 21 (3), 316-324 PubMed.

Other sources of information

  • Depenbrock S (2017) Ruminant Field Anesthesia and Analgesia. In: Penn Conference Proceedings. Davis, USA. Website: www.vet.upenn.edu (pdf download).

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