Inter-Research > DAO > v89 > n2 > p185-189  
Diseases of Aquatic Organisms

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DAO 89:185-189 (2010)  -  DOI:

Occurrence of spontaneous tumours of the renal proximal tubules in oscars Astronotus ocellatus

Oliver Hochwartner1,*, Gerhard Loupal2, William H. Wildgoose3, Heike Schmidt-Posthaus4

1Schwarzenhaidestraße 41, 1230 Vienna, Austria
2Institute of Pathology and Forensic Veterinary Medicine, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
3Midland Veterinary Surgery, 655 High Road, Leyton, London E10 6RA, UK
4Centre for Fish and Wildlife Health, Institute of Animal Pathology, Laenggassstrasse 122, PO Box 8466, 3001 Berne, Switzerland

ABSTRACT: This report describes the occurrence of renal papillary cystic adenomas and adenocarcinomas in oscars Astronotus ocellatus Cuvier, 1829. Samples from 5 oscars with abdominal swelling were collected between 1996 and 2004 and compared to a published case from the USA. Macroscopically, all cases revealed a large, well-demarcated, greyish-brown nodular mass in a retroperitoneal position within the body cavity, and originating from the posterior kidney. Histologically, these neoplasms were composed of epithelial cells, which were arranged in papillary cystic tubular structures and partly covered by cilia. In this study, microscopic and ultrastructural examination confirmed that the origin of the neoplasm was the proximal tubules of the kidney.

KEY WORDS: Oscar · Astronotus ocellatus · Papillary cystic adenoma/adenocarcinoma · Kidney · Proximal tubules

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Cite this article as: Hochwartner O, Loupal G, Wildgoose WH, Schmidt-Posthaus H (2010) Occurrence of spontaneous tumours of the renal proximal tubules in oscars Astronotus ocellatus. Dis Aquat Org 89:185-189.

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