Subretinal and Retrolaminar Migration of Intraocular Silicone Oil Detected on CT

Overview

Journal AJNR Am J Neuroradiol

Specialty Neurology

Date 2019 Aug 31

PMID 31467241

Citations 3

Authors

M Abdalkader

K Takumi

M N Chapman

G D Barest

C Peeler

O Sakai

Affiliations

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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 ( = 2), retrolaminar optic nerve ( = 5), optic chiasm ( = 3), optic tract ( = 3), and in the lateral ventricles ( = 1). Attenuation values of the structures with silicone oil migration were significantly higher than those of the control regions (optic nerve head, 69.2 ± 12.4 vs 29.8 ± 10.2 HU, < .001; retrolaminar optic nerve, 59.9 ± 11.6 vs 30.9 ± 8.6 HU, < .001; optic chiasm, 74.2 ± 11.0 vs 25.6 ± 6.9 HU, < .001; optic tract, 70.1 ± 4.7 vs 28.7 ± 7.2 HU, < .001). No significant ophthalmic or neurologic complications were documented in the patients with silicone oil migration.

Conclusions: Subretinal and retrolaminar migration of intraocular silicone oil is common. Although there were no apparent complications associated with silicone oil migration, the radiologist and clinician should be aware of this phenomenon.

Citing Articles

Retrolaminar migration as a complication of intraocular silicone oil injection detected on unenhanced CT.

Zhao F, Pan Y, Jin H, Wu Y, Yan Y, Meng Y Int J Ophthalmol. 2023; 16(9):1521-1526.

PMID: 37724262 PMC: 10475618. DOI: 10.18240/ijo.2023.09.20.

Retrolaminar chiasmal migration of intraocular silicone oil masquerading as subarachnoid hemorrhage on CT head.

Hamad E, Azhar J, Allam T Radiol Case Rep. 2023; 18(10):3463-3466.

PMID: 37520154 PMC: 10374867. DOI: 10.1016/j.radcr.2023.06.065.

Risk factors for epiretinal membrane in eyes with primary rhegmatogenous retinal detachment that received silicone oil tamponade.

Pan Q, Gao Z, Hu X, Wu Q, Zheng J, Zhang Z Br J Ophthalmol. 2022; 107(6):856-861.

PMID: 35184034 PMC: 10314004. DOI: 10.1136/bjophthalmol-2021-320121.

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