Mediastinal teratoma in a free-ranging American black bear (ursus Americanus)

Brandon A. Munk, J. Chris Turner, Michael K Keel

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


A 2.75-yr-old female American black bear (Ursus americanus) was found emaciated and unable to rise. It was euthanized due to the perceived poor prognosis. An approximately 18 × 8 × 10-cm, multiloculated, well-demarcated mass that extended from the bifurcation of the trachea, laterally displacing the lung lobes and caudally displacing the heart. The mass contained fibrous connective tissue, cartilage, bone, nervous tissue, smooth muscle, and a variety of epithelial structures. A mediastinal teratoma was diagnosed based on the microscopic features of the neoplasm.

Original languageEnglish (US)
Pages (from-to)1120-1122
Number of pages3
JournalJournal of Zoo and Wildlife Medicine
Issue number4
StatePublished - Dec 2013


  • Black bear
  • neoplasia
  • teratoma
  • Ursus

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)


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