{Reference Type}: Case Reports
{Title}: Atypical chorioretinal coloboma in a Golden Retriever: a retinographic, fluoroangiographic, and optical coherence tomography study.
{Author}: Gonzalez-Alonso-Alegre EM;Rodriguez-Alvaro A;Esteban-Martín J;
{Journal}: Vet Ophthalmol
{Volume}: 19
{Issue}: 6
{Year}: Nov 2016
{Factor}: 1.444
{DOI}: 10.1111/vop.12328
{Abstract}: <B>OBJECTIVE: </B>To report a case of canine atypical chorioretinal coloboma where ophthalmoscopic, fluoroangiographic and optical coherence tomography characteristics are described.<BR><B>METHODS: </B>A 2-year-old Golden Retriever dog in which routine ophthalmoscopic examination allowed diagnosis of a posterior coloboma on the left eye.<BR><B>METHODS: </B>Retinography, fluorescein angiography, and optical coherence tomography were performed to characterize the lesion of the left fundus.<BR><B>RESULTS: </B>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.<BR><B>CONCLUSIONS: </B>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.