Intracoelomic Teratoma in an Eclectus Parrot (Eclectus roratus)

Area of Science:

• Veterinary Medicine
• Avian Pathology
• Oncology

Background:

• Teratomas are rare in avian species, with few reported cases in psittacines.
• Intracoelomic masses in birds can present with non-specific clinical signs such as respiratory distress and lethargy.
• Diagnostic imaging and cytologic evaluation are crucial for initial assessment of coelomic masses.

Purpose of the Study:

• To report a case of teratoma in a 26-year-old male eclectus parrot.
• To discuss the diagnostic challenges and histopathologic findings of avian teratomas.
• To emphasize the importance of including teratomas in the differential diagnosis for intracoelomic masses in birds.

Main Methods:

• Clinical presentation, diagnostic imaging (radiography, computed tomography), fine-needle aspirate with cytology, exploratory coeliotomy, and histopathologic examination with immunohistochemistry were utilized.
• The intracoelomic mass was surgically resected.
• Tissue samples were analyzed to determine the origin and type of neoplastic cells.

Main Results:

• A large intracoelomic mass was identified, originating from three primordial germinal layers, consistent with a teratoma.
• Cytology revealed a neoplastic process, but the specific tissue type could not be determined.
• Despite successful surgical resection, the patient experienced complications and succumbed to the condition.

Conclusions:

• Teratomas are rare but should be considered in the differential diagnosis of unknown intracoelomic masses in avian species.
• This case adds to the limited knowledge of teratomas in psittacine birds.
• Further research is needed to understand the pathogenesis and treatment of teratomas in avian populations.