A 10-yr-old female black bear (Ursus americanus) at the North Carolina Zoological Park presented with a 2-wk history of intermittent coughing and stertor. The animal was anesthetized for examination, and at intubation, a large mass associated with the tonsils and larynx was observed obstructing the airway. Cardiopulmonary collapse occurred during the procedure, and efforts at resuscitation were ineffective. At necropsy, an 8 cm times 6 cm times 5 cm mass was present in the larynx, infiltrating the epiglottis and obstructing the airway. Regional lymph nodes were mildly enlarged and contained tan inspissated substance. Histologically, the neoplasm was composed of nests of keratinizing squamous epithelial cells with evidence of lymphatic invasion and metastases to regional lymph nodes.
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1 September 2005
LARYNGEAL SQUAMOUS CELL CARCINOMA IN A NORTH AMERICAN BLACK BEAR (URSUS AMERICANUS)
David S. Rotstein,
Pamela Govett,
Barbara Wolfe
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Journal of Zoo and Wildlife Medicine
Vol. 36 • No. 3
September 2005
Vol. 36 • No. 3
September 2005
larynx
North American black bear
squamous cell carcinoma
Ursus americanus