Iridociliary adenoma in a greater sulfur-crested cockatoo (Cacatua galerita galerita).

A 34-year-old female greater sulfur-crested cockatoo (Cacatua galerita galerita) was referred for suspected left globe rupture. Ophthalmic examination revealed effacement of the anterior chamber and cornea by a large mass. The left eye was enucleated due to suspicion of globe rupture, secondary to a neoplastic process or chronic trauma. Histopathological examination revealed complete effacement of the internal ocular structures by a neoplasm morphologically consistent with an iridociliary adenoma. The diagnosis was confirmed by Periodic acid-Schiff histochemistry and immunohistochemistry for S100, Melan-A/PNL2, and vimentin antigens. The cockatoo recovered well from surgery, with appropriate healing of the enucleation site, and no evidence of recurrence at 1-year follow-up. Key clinical message: To the authors' knowledge, this is the first report of iridociliary adenoma in a greater sulfur-crested cockatoo, and the third report of such a neoplasm in a psittacine species with a description of the use of immunohistochemistry to confirm a diagnosis of a rare tumor in a bird species. Copyright and/or publishing rights held by the Canadian Veterinary Medical Association.

Citation

Sara Gardhouse, Chantale L Pinard, Trinita Barboza, Britta Knight, Omar A Zaheer, Leonardo Susta, Hugues Beaufrère. Iridociliary adenoma in a greater sulfur-crested cockatoo (Cacatua galerita galerita). The Canadian veterinary journal = La revue veterinaire canadienne. 2021 Mar;62(3):226-232

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PMID: 33692576

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