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A case of metastatic non-teratoid ocular medulloepithelioma in an adult horse

Nascimento, Daniel Lúcio do; Carvalho, Gabriel Domingos; Nonato, Idelvânia dos Anjos; Salgado, Breno Souza.
Braz. J. Vet. Pathol.; 14(2): 102-106, jul. 2021. ilus
Artigo em Inglês | VETINDEX | ID: vti-31456


This case reports an eight-years-old horse that presented a unilateral tumor in the left ocular orbital region diagnosed on the basis of clinical signs, gross anatomopathological and histopathological investigations. The affected area was exenteration and submitted to histopathological evaluation and was diagnosed as a non-teratoid medulloepithelioma. This is a rare ocular neoplasm that usually affects young individuals and was composed by neuroepithelium arranged in tubules and Flexner-Wintersteiner rosettes without presence of heteroplastic components. The animals died and was submitted to post-mortem evaluation, revealing presence of medulloepithelioma metastases at the internal region of the head, lymph nodes, lungs, and liver. This neoplasm usually presents a benign frame; however, the case herein described shows that it can be highly malignant and aggressive since it can cause extensive lesions and spread metastases to visceral organs.(AU)
Biblioteca responsável: BR68.1
Localização: BR68.1