%0 Case Reports
%T Bilateral corneal dermoids associated with bilateral choroido-scleral colobomas in a cat: retinographic and optical coherence tomography study with surgical outcome and follow-up.
%A Cognard SA
%A Cassagnes C
%A Chaudieu G
%A Manning H
%J Vet Ophthalmol
%V 26
%N 4
%D 2023 Jul 27
%M 37106503
%F 1.444
%R 10.1111/vop.13103
%X <B>OBJECTIVE: </B>To report a case of feline bilateral corneal dermoids, associated with unilateral iris coloboma and bilateral choroido-scleral colobomas in the same dorsolateral position, to describe retinographic and optical coherence tomography (OCT) characteristics, surgical outcome, and follow-up.<BR><B>METHODS: </B>A 9-month-old domestic shorthaired cat in which a full ophthalmoscopic examination was performed for evaluation of dermoids resulting in a diagnosis of associated iris coloboma in one eye and posterior colobomas in both eyes.<BR><B>METHODS: </B>Retinographies and OCT were performed under anesthesia to characterize the lesions of both fundi and allow surgical excision of the corneal dermoids.<BR><B>RESULTS: </B>Ophthalmoscopy and retinographies revealed oval lesions in the dorsolateral fundi of both eyes. The lesions precisely mirrored their respective dermoids' (10-11 h OD and 1-2 h OS) clock positions, lacked a tapetum lucidum and choroidal vessels, and featured thin retinal vessels plunging to a posterior plane of the fundus. OCT crossline scans demonstrated preservation of retinal thickness and morphological layering in the fundic colobomas leading to the conclusion that the colobomas were purely choroido-scleral. The outcome of the surgical excision of the dermoids was satisfactory without hair recurrence and with acceptable corneal clarity making it possible to visualize the unilateral associated iris coloboma. Follow-ups did not reveal any fundic evolution nor retinal detachment.<BR><B>CONCLUSIONS: </B>Retinographies and OCT made possible the characterization of choroido-scleral colobomas associated with corneal dermoids in this first reported case in a cat. We hypothesize that the recently described superior ocular sulcus might be the embryological link between these anomalies.