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Air sac adenocarcinoma of the sternum in a Quaker parrot (Myiopsitta monachus)

  • Author(s): Loukopoulos, P
  • Okuni, JB
  • Micco, T
  • Garcia, JP
  • Uzal, FA
  • Diab, SS
  • et al.
Abstract

© Copyright 2014 by American Association of Zoo Veterinarians. Respiratory neoplasia is rarely reported in avian species. A 17-yr-old Quaker parrot (Myiopsitta monachus) was admitted with a 2-wk history of anorexia, depression, and respiratory distress. Clinical examination revealed a large, firm mass in the left pectoral muscle. Radiology showed a mass silhouetting the heart and the liver. Supportive treatment was provided, but the bird died during the seventh weekly visit to drain thoracic cavity fluid. Necropsy showed a white, 3 × 3 × 2-cm, hard, gritty sternal mass. Histology showed a nonencapsulated, moderately differentiated air sac carcinoma of the sternum. Immunohistochemically the neoplasm was cytokeratin positive and vimentin and calretinin negative. This is the first report of an air sac neoplasia in a Quaker parrot and one of few respiratory tumors in psittacines.

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