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Mammals (other)
Rapidly growing primary malignant teratoid medulloepithelioma of the ciliary body in a gelding
  1. Thomas van Bergen1,
  2. Cynthia De Vries2,
  3. Richard Ducatelle2,
  4. Ann Martens1 and
  5. Frank Gasthuys1
  1. 1Surgery and Anaesthesia Department, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke 9820, Belgium
  2. 2Department of Pathology, Bacteriology and Poultry Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke 9820, Belgium
  1. Correspondence to Dr Thomas van Bergen, thomas.vanbergen{at}ugent.be

Abstract

Intraocular medulloepithelioma is a relatively rare tumour in horses which is difficult to differentiate from retinoblastoma. The rate of growth of this tumour has not been investigated so far. We present a case of a primary intraocular teratoid malignant medulloepithelioma in a four-year-old gelding that was unilaterally blind at presentation. Repeated examination revealed rapid growth of the tumour. After enucleation of the affected eye, the horse returned to its former level of performance without recurrence for 12 months postoperatively. The histological and immunohistochemical examination of the mass clearly confirmed the malignancy of the tumour. Clinicians should be aware of the potential malignant behaviour of intraocular neoplasias. Immunohistochemistry plays an important role in the final diagnosis.

  • Horses
  • Ophthalmology
  • Neoplasia
  • Medulloepithelioma
  • Immunohistochemistry
  • Received March 26, 2014.
  • Revision received June 3, 2014.
  • Accepted June 23, 2014.

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  • Received March 26, 2014.
  • Revision received June 3, 2014.
  • Accepted June 23, 2014.
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