Dorsally located corneal dermoid in a cat

Objective To describe clinical features of dogs diagnosed with ocular dermoids at two veterinary teaching hospitals. Animals studied Retrospective case series of 44 dogs (49 dermoids) with ocular dermoids. Procedures Medical records of dogs evaluated by the Cornell University and University of Pennsylvania ophthalmology services were evaluated to identify dogs with a clinical diagnosis of ocular dermoids between 2004 and 2018, and 2011 and 2018, respectively. Signalment, historical, and clinical details were recorded, including dermoid location, concurrent diseases, treatment, histopathologic findings, and outcome. Results A total of 49 ocular dermoids, involving 47 eyes, were diagnosed in 44 dogs. The mean ( standard deviation) age of the study population at the time of diagnosis was 1.19 years (1.85 years). Of the 44 dogs evaluated, 28 (63.6%) were male and 30 (68.2%) were intact at time of diagnosis. Twenty‐two different breeds were represented in the study, with mixed breed, French Bulldog, and Shih Tzu being the most common. Twenty‐two dermoids were categorized as limbal (44.9%), 14 as eyelid (28.6%), eight as corneal (16.3%), and five as conjunctival (10.2%). Concurrent ocular findings were noted in 29 of the 47 eyes (61.7%), including corneal pigmentation, epiphora, and conjunctival hyperemia. Nine dogs (20.5%) suffered from concurrent systemic disease, with the majority being cardiac in origin. A total of 34 dermoids (69.4%) were surgically excised with no recurrences. Conclusions Ocular dermoids are an uncommon condition in dogs. Concurrent congenital cardiac disease was relatively common in the dogs of this study. Surgical excision of dermoids was curative.

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ocular dermoids in dogs: A retrospective study

Badanes

Ledbetter

2019

Congenital ocular malformations in dogs and cats: 123 cases

Saraiva

Delgado

2020

Objective Provide epidemiological data regarding the prevalence of congenital ocular malformations in dogs and cats. Animals studied A population of 32 974 dogs and 13 977 cats that presented for consultation at the veterinary teaching hospital. Procedures Medical records from 2011 to 2018 were reviewed. A retrospective and prospective epidemiological clinical study addressing congenital ocular malformations was conducted. Signalment, medical history, reason for presentation, clinical findings, vision impairment, and treatment options were analyzed. Results From the total of cases analyzed, 103 dogs (0.3%) and 20 cats (0.1%) met the inclusion criteria. The majority of dogs were mixed breed, the most common breed being the French Bulldog, while the majority of cats were European domestic shorthair. The median age of diagnosis was 12 months for dogs and 6 months for cats. Sex predisposition was not found. The most frequently identified abnormalities were as follows: congenital cataract (dogs: 31.1%; cats: 30.0%), microphthalmia (dogs: 35.0%, cats: 25.0%), and persistent pupillary membrane (dogs: 27.2%, cats: 40.0%). Some of the concurrently observed malformations were significantly associated. A statistically significant association was found between ocular dermoids and the French Bulldog breed (P < .001). Conclusions Even though congenital ocular malformations are uncommon, knowledge about their prevalence is important, since they can cause vision impairment or even blindness. Moreover, some human ocular disease phenotypes are similar to the ones presented by dogs and cats, so they can be used as models to investigate pathophysiology and therapeutic approaches.

Bilateral corneal dermoids associated with bilateral choroido–scleral colobomas in a cat: retinographic and optical coherence tomography study with surgical outcome and follow–up

Cognard¹,

Cassagnes

Chaudieu³

et al. 2023

Purpose 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. Animal studied 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. Procedures Retinographies and OCT were performed under anesthesia to characterize the lesions of both fundi and allow surgical excision of the corneal dermoids. Results 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. Conclusions 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.