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.
Souza
Marcy J
MJ
Department of Small Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996, USA. msouza@utk.edu
Newman
Shelley J
SJ
Greenacre
Cheryl B
CB
Avenell
James S
JS
Wall
Jonathan S
JS
Phillips
Jeffrey C
JC
Fry
Michael M
MM
Donnell
Robert L
RL
Daniel
Gregory B
GB
D000818:Animals; D001715:Bird Diseases / Q000473:pathology*; D005065:Euthanasia; D007414:Intestinal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D008228:Lymphoma, Non-Hodgkin / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D016410:Lymphoma, T-Cell, Cutaneous / Q000000981:diagnostic imaging / Q000473:pathology / Q000662:veterinary*; D010311:Parrots; D049268:Positron-Emission Tomography / Q000662:veterinary; D011859:Radiography