Elisa M Gonzalez-Alonso-Alegre1, Alfonso Rodriguez-Alvaro2, Javier Esteban-Martín3. 1. Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria de la Universidad Complutense de Madrid, Hospital Clínico Veterinario Complutense, Avda. Puerta de Hierro s/n, 28040, Madrid, Spain. elisag@ucm.es. 2. Departamento de Medicina y Cirugía Animal, Facultad de Veterinaria de la Universidad Complutense de Madrid, Hospital Clínico Veterinario Complutense, Avda. Puerta de Hierro s/n, 28040, Madrid, Spain. 3. Clinica Veterinaria Oftalmológica Ocaña, C/de Ocaña n° 201, 28047, Madrid, Spain.
Abstract
PURPOSE: To report a case of canine atypical chorioretinal coloboma where ophthalmoscopic, fluoroangiographic and optical coherence tomography characteristics are described. ANIMAL STUDIED: A 2-year-old Golden Retriever dog in which routine ophthalmoscopic examination allowed diagnosis of a posterior coloboma on the left eye. PROCEDURES: Retinography, fluorescein angiography, and optical coherence tomography were performed to characterize the lesion of the left fundus. RESULTS: Ophthalmoscopy revealed a pigmented circumscribed lesion dorsal to the optic nerve of the left fundus, surrounded by small areas of hyper-reflectivity and retinal vessels with an abnormal pattern. Fluoroangiography revealed a constant hypofluorescence of the defect and a complete altered vascular pattern associated with the coloboma. Optical coherence study demonstrated an important craterlike depression showing an atrophic neurosensory retina, and a lack of retinal pigment epithelium and choroidal tissue. CONCLUSIONS: Fluoroangiographic and optical coherence tomographic studies of an atypical chorioretinal coloboma in a dog are reported for the first time. Both imaging techniques are of great importance to characterize this type of congenital defects.
PURPOSE: To report a case of canine atypical chorioretinal coloboma where ophthalmoscopic, fluoroangiographic and optical coherence tomography characteristics are described. ANIMAL STUDIED: A 2-year-old Golden Retriever dog in which routine ophthalmoscopic examination allowed diagnosis of a posterior coloboma on the left eye. PROCEDURES: Retinography, fluorescein angiography, and optical coherence tomography were performed to characterize the lesion of the left fundus. RESULTS: Ophthalmoscopy revealed a pigmented circumscribed lesion dorsal to the optic nerve of the left fundus, surrounded by small areas of hyper-reflectivity and retinal vessels with an abnormal pattern. Fluoroangiography revealed a constant hypofluorescence of the defect and a complete altered vascular pattern associated with the coloboma. Optical coherence study demonstrated an important craterlike depression showing an atrophic neurosensory retina, and a lack of retinal pigment epithelium and choroidal tissue. CONCLUSIONS: Fluoroangiographic and optical coherence tomographic studies of an atypical chorioretinal coloboma in a dog are reported for the first time. Both imaging techniques are of great importance to characterize this type of congenital defects.
Authors: Shin Ae Park; Dodd Sledge; Colleen F Monahan; Leandro Teixeira; Ryan Boyd; Katie Freeman; Kristin Koehl; Christine Harman; Kirk Munoz; Laurence M Occelli; Chris G Pirie; Harriet Davidson; Simon Petersen-Jones; András M Komáromy Journal: BMC Vet Res Date: 2022-05-16 Impact factor: 2.792