Retinography, fluorescein angiography, and optical coherence tomography were performed to characterize the lesion of the left fundus.
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.
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.
Source: Gonzalez-Alonso-Alegre, E. M., Rodriguez-Alvaro, A. and Esteban-MartÃn, J. (2016), Atypical chorioretinal coloboma in a Golden Retriever: a retinographic, fluoroangiographic, and optical coherence tomography study. Veterinary Ophthalmology, 19: 525–530. doi: 10.1111/vop.12328
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