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Mammals (other)
Extraskeletal osteosarcoma in an Egyptian fruit bat (Rousettus aegyptiacus)
  1. June E Olds1,2 and
  2. Rachel J Derscheid3
  1. 1 Veterinary Clinical Sciences, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
  2. 2 Animal Health, Blank Park Zoo, Des Moines, Iowa, USA
  3. 3 Veterinary Diagnostic and Production Animal Medicine, Iowa State University College of Veterinary Medicine, Ames, Iowa, USA
  1. Correspondence to Dr June E Olds; jeolds{at}


Extraskeletal osteosarcomas (EOS) are extremely rare mesenchymal tumours arising in various soft tissue locations. They have been documented in humans and companion animal species. Reports of neoplasia in Chiroptera were previously thought to be rare. However, recent publications have reported a variety of neoplastic tumours in Egyptian fruit bats (Rousettus aegyptiacus). This report describes the clinical presentation and histopathological findings associated with the diagnosis of EOS in a 15-year-old Egyptian fruit bat housed within a zoo. To the authors’ knowledge, this is the first report of EOS in a Rousettus.

  • bat
  • extraskeletal osteosarcoma
  • neoplasia
  • Rousettus
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  • Contributors The manuscript was written by JEO. JEO and RJD have contributed to the manuscript editing, figures and review.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.

  • Data sharing statement There are no additional data available.

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