Ocular teratoid medulloepithelioma in a northern red-shouldered macaw: case report and literature review. (May 2021)

• Record Type: Journal Article
• Authors: Leal de Araújo, Jeann; Arruda, Alice C. A. M.; Santos, Nayadjala T. A.; Dias, Glenison F.; Nery, Thiago F. L.; Del Piero, Fabio; Ploeg, Richard; Porter, Brian F.; Langohr, Ingeborg M.
• Is Part Of: Journal of veterinary diagnostic investigation. Volume 33:Number 3(2021)
• Page Start: 600
• Page End: 604
• Publication Date: 2021-05
• Subjects: Diopsittaca nobilis -- eye -- ocular tumors -- psittacine birds -- retrobulbar teratoid medulloepithelioma -- wildlife; Veterinary medicine -- Diagnosis -- Periodicals; 636.0896075
• DOI: 10.1177/1040638721994601
• Languages: English
• ISSNs: 1040-6387

Abstract

A 4-mo-old northern red-shouldered macaw ( Diopsittaca nobilis ) was admitted to the veterinary hospital of the Arruda Câmara Zoo, in the State of Paraiba, Brazil, for investigation of an orbital mass. Given rapid progression and lack of response to treatment, the bird was euthanized, and an autopsy was performed. Histologically, the mass consisted of a retrobulbar invasive tumor characterized by tubular and rosette-like structures, with interspersed heteroplastic tissues, such as aggregates of neuroglial cells and islands of hyaline cartilage. The tumor was immunopositive for pancytokeratin, GFAP, NSE, and S100. These findings were compatible with an ocular teratoid medulloepithelioma, a neoplasm best described in humans but also reported rarely in young cockatiels and African Grey parrots.