Diffuse intestinal T cell lymphosarcoma in a yellow-naped Amazon parrot (Amazona ochrocephala auropalliata)
A 10-year-old, intact, female yellow-naped Amazon parrot was examined because of anemia, lymphocytic leukocytosis, regurgitation, and weight loss. A positive fecal occult blood and monoclonal globulinopathy were present. A distended proventriculus and diffusely thickened loops of small intestine with irregular luminal surfaces were identified with contrast radiography and contrast computed tomography. A micro positron emission tomography scan was performed with (18)F-fluorodeoxyglucose. Diffuse intestinal T-cell lymphosarcoma was diagnosed based on histopathology and immunohistochemistry of full thickness small intestinal biopsies. The patient was treated with a multidrug chemotherapy protocol with little to no effect. Euthanasia was elected, and intestinal lymphosarcoma was confirmed on histopathology of necropsy intestinal samples; no other organs demonstrated neoplastic infiltration. To the authors' knowledge, no reports are currently available detailing the clinical presentation or diagnosis of diffuse intestinal T-cell lymphosarcoma in any avian species.
M J. Souza, Shelley Newman, C B. Greenacre, J S. Avenell, J S. Wall, J C. Phillips, M M. Fry, R L. Donnnell, and G B. Daniel. "Diffuse intestinal T cell lymphosarcoma in a yellow-naped Amazon parrot (Amazona ochrocephala auropalliata)" Journal of Veterinary Diagnostic Investigation 20.5 (2008): 656-660.