Open AccessOcular teratoid medulloepithelioma in a northern red-shouldered macaw: case report and literature review
Author(s) -
Josinaldo Lopes Araújo,
Ângela Arruda,
Nayadjala Távita Alves dos Santos,
Glenison Ferreira Dias,
Thiago Ferreira Lopes Nery,
Fábio Del Piero,
Richard Ploeg,
Brian F. Porter,
Ingeborg M. Langohr
Publication year - 2021
Publication title -
journal of veterinary diagnostic investigation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.529
H-Index - 78
eISSN - 1943-4936
pISSN - 1040-6387
DOI - 10.1177/1040638721994601
Subject(s) - macaw , pathology , autopsy , medicine , anatomy , biology , paleontology
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.