title: Extraskeletal osteosarcoma of the thorax in a goat: case report.
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.
  
  
  METHODS
  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.
authors.affiliation: Department of Farm Animals, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland. ubraun@vetclinics.uzh.ch
authors.forename: Ueli
authors.initials: U
authors.lastname: Braun
authors.forename: Colin C
authors.initials: CC
authors.lastname: Schwarzwald
authors.forename: Eva
authors.initials: E
authors.lastname: Forster
authors.forename: Mareike
authors.initials: M
authors.lastname: Becker-Birck
authors.forename: Nicole
authors.initials: N
authors.lastname: Borel
authors.forename: Stefanie
authors.initials: S
authors.lastname: Ohlerth
mesh_terms: D000818:Animals; D017809:Fatal Outcome; D015511:Goat Diseases / Q000000981:diagnostic imaging / Q000473:pathology*; D006041:Goats; D006651:Histocytochemistry / Q000662:veterinary; D008297:Male; D012516:Osteosarcoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D013909:Thorax / Q000000981:diagnostic imaging / Q000473:pathology*; D014057:Tomography, X-Ray Computed / Q000662:veterinary; D014463:Ultrasonography