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.

一只 4 个月大的北方红肩金刚鹦鹉 ( Diopsittaca nobilis ) 被送往巴西帕拉伊巴州 Arruda Câmara 动物园的兽医医院，以调查其眼眶质量。鉴于快速进展和对治疗缺乏反应，这只鸟被安乐死，并进行了尸检。组织学上，肿块由球后浸润性肿瘤组成，其特征是管状和玫瑰花状结构，散布着异质组织，例如神经胶质细胞聚集体和透明软骨岛。肿瘤对泛细胞角蛋白、GFAP、NSE 和 S100 呈免疫阳性。这些发现与眼部畸胎样髓样上皮瘤相符，这是一种在人类中描述得最好的肿瘤，但在年轻的玄凤鹦鹉和非洲灰鹦鹉中也很少报道。