Successful Management of a Refractory Orbital Pseudocyst in a Chinese Goose Using Intraorbital Gentamicin Injection

OBJECTIVE: To report the successful management of recurrent orbital swelling in a Chinese goose (Anser cygnoides ) following evisceration surgery, utilizing intraorbital gentamicin injection after multiple unsuccessful interventions.

ANIMAL STUDIED: A 3-year-old, 4.58 kg male Chinese goose (Anser cygnoides ).

PROCEDURES: The goose was referred for evaluation of recurrent swelling of the right orbit following evisceration surgery performed after a severe corneal injury. Initial interventions included fluid drainage, revision surgeries with placement of Lyostypt and bone cement implants, sinus communication attempts, and placement of a Jackson-Pratt surgical drain. Diagnostic evaluation included physical examination, computed tomography (CT), cytology, histopathology, and bacterial culture. Despite these interventions, the orbital swelling recurred. Finally, an intraorbital injection of gentamicin (9 mg/kg) was administered following fluid drainage. Post-injection follow-up was conducted over 6 months.

RESULTS: Following the intraorbital gentamicin injection, the recurrent swelling resolved without any adverse effects. The goose remained clinically normal at a six-month follow-up, with no signs of recurrence.

CONCLUSIONS: This case highlights the challenges of managing recurrent orbital swelling in avian species following evisceration surgery and the potential utility of intraorbital gentamicin injections. Gentamicin's cytotoxic effects on secretory tissue may offer an effective treatment option for refractory cases. Further studies are warranted to explore the safety and efficacy of this approach in avian species.