Subretinal and Retrolaminar Migration of Intraocular Silicone Oil Detected on CT

Abstract

BACKGROUND AND PURPOSE: Intraocular silicone oil injection has been used to treat complicated retinal detachments, and recently its retrolaminar and intracranial migration has been reported. The purpose of this study was to document the prevalence of posterior migration of intraocular silicone oil on head CT and describe the clinical and radiologic findings. MATERIALS AND METHODS: This retrospective study included 57 patients with intraocular silicone oil injection who underwent unenhanced head CT between November 2008 and July 2018. All images were visually evaluated for subretinal and retrolaminar migration of intraocular silicone oil involving the anterior visual pathway (optic nerve, optic chiasm, and optic tract) and the ventricular system. Attenuation values of those structures were measured and compared with those of the contralateral or adjacent normal structures. RESULTS: We detected subretinal and retrolaminar silicone oil migration in 7 of the 57 patients (12%), noting silicone oil at the optic nerve head (n = 2), retrolaminar optic nerve (n = 5), optic chiasm (n = 3), optic tract (n = 3), and in the lateral ventricles (n = 1). Attenuation values of the structures with silicone oil migration were significantly higher than those of the control regions (optic nerve head, 69.

Complications associated with the use of silicone oil: A systematic review

“…Ultrastructural studies have shown alterations in lens epithelial cells [7][8][9] . Cataracts are also a cause of low vision and its removal should be scheduled at the same time of SO removal, considering the corneal endothelial cell count, which could be altered by the effect of SO [23][24][25][26][27][28][29][30][31][32][33][34] . In our review we found that this is the main complication reported.…”

“…Many authors believe that OHT could be associated, but there are no studies with a robust methodology to confirm any of these theories. Rates range from 3.3% to 5.9% of cases [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] .…”

Complicaciones asociadas al uso de aceite de silicona: revisión sistemática

“…Los estudios ultraestructurales han demostrado alteraciones en las células epiteliales del cristalino [7][8][9] . La catarata es también causa de baja visión y debe considerarse su extracción cuando se planifique el retiro del AS, teniendo en consideración el recuento de células endoteliales corneales, el cual podría estar alterado por el efecto del AS [23][24][25][26][27][28][29][30][31][32][33][34] . En nuestra revisión encontramos que esta es la principal complicación reportada.…”

“…Muchos autores creen que la HTO podría estar asociada, pero no existen estudios con metodología de peso para afirmar ninguna de estas teorías. Las tasas van del 3.3% al 5.9% de los casos [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] .…”

Intraocular Silicone Oil Implant Migration in a Patient with a Craniopharyngioma

“…Silicone oil migration is usually an asymptomatic entity however it has been associated with neurological symptoms such as headache, dizziness and seizures [6]. Silicone oil on CT images presents as a hyperdense lesion with predilection of non-dependent locations secondary to the lower specific gravity in relation to the cerebrospinal fluid [7]. On average specific gravity for silicone oil used in ocular surgery is 0.97 g/cm 3 whereas specific gravity of CSF ranges from 1.0063 to 1.0075 g/cm 3 [8,9].…”