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1 March 2013 PRIMARY OCULAR CHONDROSARCOMA IN A DISCUS (SYMPHISODON AEQUIFASCIATUS)
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Abstract

An adult discus (Symphisodon aequifasciatus) with a history of buphthalmia and anorexia was referred, from an aquarium, for clinical examination. Surgery was performed to enucleate the eye and obtain a definitive diagnosis. Macroscopic examination revealed a yellowish mass that affected the eye. Histologic examination of the mass revealed a poorly demarcated, high cellular infiltrative mesenchymal neoplasm composed of ovoidal-spindloid cells with elongated nuclei and with scant cytoplasm arranged in a solid pattern. Throughout the tumor, there were scattered foci of cartilaginous differentiation that stained deeply with alcian blue and stained metachromatically with toluidine blue. The neoplastic cells were immunolabeled to varying degrees by antibodies against vimentin and SOX-9. Based on morphologic, histochemical, and immunohistochemical characteristics, the tumor was diagnosed as a chondrosarcoma.

American Association of Zoo Veterinarians
Gian Enrico Magi, Giacomo Renzoni, Angela Palumbo Piccionello, and Giacomo Rossi "PRIMARY OCULAR CHONDROSARCOMA IN A DISCUS (SYMPHISODON AEQUIFASCIATUS)," Journal of Zoo and Wildlife Medicine 44(1), 225-231, (1 March 2013). https://doi.org/10.1638/1042-7260-44.1.225
Received: 29 August 2012; Published: 1 March 2013
JOURNAL ARTICLE
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