Peer-reviewed veterinary case report
Congenital glaucoma diagnosed before death in young white-bellied
By Cococcetta, Ciro et al.·Published in Veterinary ophthalmology·2021·CVS Roma Centro Veterinario Specialistico, Italy·View original on PubMed →
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Original publication title: Antemortem diagnosis of congenital glaucoma in a white-bellied caique (Pionites leucogaster).
- Species:
- bird
Plain-English summary
A 34-day-old male white-bellied caique was brought in because his eyes were bulging (buphthalmos). The vet found that his eye pressure was very high and there were corneal lesions. After tests, they suspected congenital glaucoma, a condition present at birth. They started treatment to lower the eye pressure, which worked, but unfortunately, the parrot could not feed himself and died shortly after. A postmortem exam confirmed the diagnosis of congenital glaucoma and revealed additional eye abnormalities.
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Abstract
A 34-day-old, male, white-bellied caique (Pionites leucogaster) was presented for a complaint of bilateral buphthalmos. Clinical examination was unremarkable apart from the ophthalmic findings. The ophthalmologic examination was negative for direct, consensual, and dazzle reflexes in both eyes. The intraocular pressure exceeded 40 mm Hg OU. Fluorescein stain demonstrated corneal surface lesions suggestive of exposure keratopathy subsequent to bilateral buphthalmos. Diagnostic imaging tests were conducted to perform ocular biometric measurements and investigate the intraocular structures, including the iridocorneal angle and lens, by means of high-resolution ultrasonography (HRUS). The presence of congenital glaucoma in this young parrot was strongly suspected after clinical and ophthalmological examination and the results of diagnostic imaging. Pharmacological treatment to reduce intraocular pressure was initiated using dorzolamide hydrochloride 2% and timolol maleate 0.5%. A month later, the parrot's eyes did not show any visual improvement, but the intraocular pressure had returned to normal. The parrot was unable to feed itself and died during a feeding procedure. Postmortem examination revealed ab ingestis pneumonia. Both eyes were submitted for histopathology, with severe anterior segment dysplasia and goniodysgenesis found OU. Histological findings added to the clinical presentation, the ophthalmologic examination and the imaging findings, confirmed the presence of congenital glaucoma.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/32881297/