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Open Access Highly Accessed Case report

Extraskeletal osteosarcoma of the thorax in a goat: case report

Ueli Braun1*, Colin C Schwarzwald2, Eva Forster1, Mareike Becker-Birck1, Nicole Borel3 and Stefanie Ohlerth4

Author Affiliations

1 Department of Farm Animals, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland

2 Department of Horses, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland

3 Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland

4 Diagnostic Imaging Section, University of Zurich, Zurich, Switzerland

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BMC Veterinary Research 2011, 7:55  doi:10.1186/1746-6148-7-55

Published: 19 September 2011

Abstract

Background

This report describes the results of clinical, ultrasonographic and computed tomographic examination of a 16-year-old goat with extraskeletal osteosarcoma of the thorax.

Case presentation

The lead clinical signs were abnormal condition and demeanour, fever, tachycardia, tachypnoea, dyspnoea and dilated jugular veins. Ultrasonographic examination of the thorax revealed a precardial mass, measuring 16.4 by 11.4 by 14.2 cm. Computed tomographic examination showed dorsocaudal displacement of the trachea, heart and lungs to the right. A tentative diagnosis of mediastinal or pleural neoplasia was made, and the goat was euthanased and necropsied. A definitive diagnosis was based on histological examination of the mass.

Conclusions

To our knowledge, this case report is the first description of extraskeletal osteosarcoma of the thorax in goats and serves to broaden the diagnostic spectrum of thoracic diseases in this species. Extraskeletal osteosarcoma should be part of the differential diagnosis in goats with thoracic tumours.