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Successful chemical ablation of an intraorbital cyst caused by an eyelid injury and iatrogenic ankyloblepharon formation in a duck.

Case description: A client-owned 2-year-old 1.8kg (4-lb) male pet Rouen duck (Anas platyrhynchos domesticus) was evaluated because of severe swelling around the left eye following traumatic injury to the upper and lower eyelids and two associated surgeries that resulted in removal of the entire upper and lower eyelid margins.

Clinical findings: At initial evaluation, ankyloblepharon of the left eye was observed, with no upper or lower eyelid margins and a large, round, fluctuant subcutaneous mass over the left orbit. Orbital exploration and histologic examination revealed a benign cyst consisting of fibrous tissue, conjunctiva, and skeletal muscle bundles. Bacterial culture of cystic fluid yielded few Staphylococcus delphini.

Treatment and outcome: Excision of the cyst and evisceration of the left globe were performed, and once daily treatment with orally administered enrofloxacin suspension (12.6 mg/kg [5.7 mg/lb]) and meloxicam (1 mg/kg [0.45 mg/lb]) was initiated. Over the next 4 days, the cyst redeveloped and progressively enlarged. Accumulated fluid was aspirated from the cyst, and 20 mg gentamicin was injected intraorbitally with ultrasound guidance. Over the subsequent 27 months, no recurrence of clinical signs or adverse effects were reported by the owner.

Clinical relevance. To the authors' knowledge, this is the first report of cyst formation after adnexal injury and evisceration in birds and its successful treatment with intralesional gentamicin injection. Findings emphasized the importance of preserving lacrimal puncta during adnexal or eye removal surgeries in birds. Intralesional injection of gentamicin with the goal of destroying fluidproducing cells may be a safe and effective way to treat intraorbital cysts in birds and other species, although additional research would be required to confirm this.

et al. J Am Vet Med Assoc. 2018;253:1164-1168.

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Title Annotation:Selected Abstracts From the Literature
Author:AePark, S.; Davidson, H.; Thompson, K.A.
Publication:Journal of Avian Medicine and Surgery
Date:Dec 1, 2018
Words:287
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