Hepatic T‐cell lymphoma in a blue‐fronted Amazon parrot ( Amazona aestiva ) and subcutaneous T‐cell lymphoma in a grey parrot ( Psittacus erithacus )

Abstract

Abstract T‐cell lymphoma was diagnosed in a mature blue‐fronted Amazon parrot ( Amazona aestiva ) and a mature grey parrot ( Psittacus erithacus ). The Amazon parrot was diagnosed with soft tissue sarcoma in the neck and T‐cell hepatic lymphoma. The sarcoma was surgically removed, but chemotherapy for the lymphoma was declined by the owner. This parrot survived 24 months without treatment until it was euthanased for dyspnoea, the cause of which was not investigated. The grey parrot was diagnosed with subcutaneous T‐cell lymphoma on the left side of the neck that likely originated from the thymus. The mass was surgically excised without complications. The bird remained healthy 24 months after diagnosis, at which point follow‐up was lost. This case series documents the clinical presentation and diagnostic workup of T‐cell lymphoma in two Psittacidae patients. In both cases, T‐cell lymphomas were confirmed by histological examination and CD3 immunohistochemistry.