New Stratus® Optical Coherence Tomography Findings Associated to Congenital Excavated Anomalies of the Optic Disc

Abstract

Abstract: : Purpose: To report peculiar findings obtained from a series of cases with congenital excavated anomalies of the optic disc utilizing the new Stratus imaging system. Methods: A total of eight eyes from eight patients were retrospectively evaluated. Optic nerve colobomata was observed in two cases and congenital pit of the optic disc was detected in six cases. Associated features were analysed using high resolution fluorescein and indocyanine green angiography in order to compare the findings with the Stratus® Optical Coherence Tomography images. Results: The two eyes with colobomatous-like escavation of the optic disc showed a serous sensory retinal detachment, including the macula as well as schisis degeneration of the retina on the temporal and nasal side of the optic nerve head related to two different communications. Out of the six congenital pits, five were smaller than 0.5mm in its largest linear dimension and they were found on the temporal side of the optic disc. One pit measured 3mm in its largest linear dimension, vertically elongated and located about 2mm temporal to the optic disc. Associated features were epiretinal membrane, serous sensory retina and retinal pigmented epithelium detachments as well as macular cystoid changes. Most importantly, only in the case with the giant extra disc pit there was a detectable communication, which was between the subretinal and subscleral spaces, on the supero-temporal aspect of the lesion. Conclusion: The new Stratus Optical Coherence Tomography examinations of the excavated optic disc anomalies were able to detect usual alterations (cystoid and schisis degeneration as well as serous detachment of the sensory retina) and unusual peculiar characteristics (giant extra disc pit, intraexcavation communication to subscleral space and serous retinal pigmented epithelial detachment) corroborating that colobomatous disc as well as optic disc pit and its variations may be a different manifestation of the same disease entity.

Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, S • optic disc • retinal detachment