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Unusual presentation of a T-cell-rich large B-cell lymphoma in the nictitating membrane in a seven-year-old Bavarian warmblood gelding
  1. James Oliver Rushton1,
  2. Andrea Fuchs-Baumgartinger2 and
  3. Barbara Nell1
  1. 1Department of Companion Animals and Horses, Veterinary University Vienna, Austria
  2. 2Department of Pathobiology, Veterinary University Vienna, Austria
  1. Correspondence to Dr James Oliver Rushton, james.rushton{at}


A seven-year-old, 550-kg, Bavarian warmblood gelding was referred to the Ophthalmology Service of the Veterinary University Vienna, due to a mass on the bulbar aspect of the nictitating membrane of the left eye. Thorough ophthalmic examination of the left eye revealed a red-pink mass, about 1 cm in diameter and 4 mm thickness, on the bulbar aspect of the nictitating membrane. Histopathological and immunohistological examination of the excised mass identified a T-cell-rich large B-cell lymphoma. Follow-up examination revealed no recurrence of the mass 18 months after initial presentation. To the authors' knowledge this is the first report of a histopathologically confirmed T-cell-rich large B-cell lymphoma of the ocular adnexa in the horse, with no recurrence or metastasis 18 months after initial presentation.

  • horse
  • eye
  • nictitating membrane
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