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Erschienen in: Journal of Ophthalmic Inflammation and Infection 1/2014

Open Access 01.12.2014 | Letter to the Editor

A comparison of retrokeratoprosthetic membrane and conjunctival inflammatory responses to silicone oil

verfasst von: Aubrey L Gilbert, Frederick A Jakobiec, James Chodosh, Dean Eliott

Erschienen in: Journal of Ophthalmic Inflammation and Infection | Ausgabe 1/2014

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Abstract

Silicone oil continues to be an important aid in retinal detachment surgery. We report a case in which disparate responses to silicone oil were noted in the conjunctiva and intraocularly. Intraocularly, the oil permeated a fibrous membrane that formed behind a keratoprosthesis, the first example of this phenomenon. We detail the histological response to the oil at this site as well as a distinctly different reaction present to oil in the conjunctiva of the same eye. The divergence of histological responses provides a demonstration of the eye's apparent retained capacity to protect against intraocular inflammation, despite multiple previous surgeries.
Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s12348-014-0015-y) contains supplementary material, which is available to authorized users.

Competing interests

The authors declare that they have no competing interests.

Authors' contributions

AG facilitated the processing and review of all tissue samples, performed the literature review, and drafted the original manuscript. FJ conceived of the paper, reviewed the pathology, and helped to develop the manuscript. JC was one of the surgeons involved in the patient's care, and he provided case history and contributed to the editing of the manuscript. DE was one of the surgeons involved in the patient's care, and he obtained tissue samples, provided case history, and contributed to the editing of the manuscript. All authors read and approved the final manuscript.
Abkürzungen
MMP
mucous membrane pemphigoid:
YAG
yttrium aluminum garnet:

Findings

Summary

Silicone oil continues to be an important aid in the performance of retinal detachment surgery. As complications of its use, we report a 52-year-old man with ocular mucous membrane pemphigoid (MMP) who developed disparate responses to silicone oil in the conjunctiva and intraocularly. The oil permeated a fibrous membrane that formed behind a keratoprosthesis, the first example of this phenomenon.

Case history

In August 2009, the patient underwent penetrating keratoplasty with implantation of a Boston type II keratoprosthesis (through the eyelid) for extensive corneal and conjunctival cicatrization. Several months later, a fine retroprosthetic membrane had developed and was treated with YAG laser. The patient was then stable until September 2011, when he experienced acutely decreased vision and was found to have vitritis. He underwent a tap and inject procedure with antibiotics and an antifungal agent placed into the eye. The vision improved but a leak around the prosthetic device was identified, prompting a prosthetic replacement. The intraocular pressure was elevated post-operatively, and the patient ultimately underwent an Ahmed valve placement. After the valve was in place, the pressure remained well-controlled, but in January 2012, the patient developed a macula-off retinal detachment for which 1,000 cSt of silicone oil was placed during retinal detachment repair. Subsequently, a new retroprosthetic membrane developed, which became progressively denser over the following months and which was not amenable to treatment with a laser (Figure 1A,B). In August 2012, the patient had surgery for removal of the membrane. At that time, silicone oil from the previous surgery was noted to have migrated into the conjunctiva. Additional samples of conjunctiva containing oil droplets were excised for pathologic examination.

Results

Two distinct histopathologic reactions to silicone oil were observed depending on whether the tissue was intraocular or extraocular. The conjunctival tissue displayed a classic lipogranulomatous response with mononucleated epithelioid cells and multinucleated giant cells surrounding large locules of dissolved-out silicone oil (Figures 1C,D,E). Stains for CD68 (Figure 1F) and CD163 were positive in these histiocytes, while CD1a was negative, establishing that the histiocytes were not Langerhans cells. Review of the retroprosthetic sample revealed smaller extracellular bubbles in the midst of a fibrous membrane (Figure 2A,B). The locules themselves were partially lined by displaced, flattened, or degenerated fibroblastic cells with occasional lipid-like, dense inclusions consistent with silicone oil. No intramembranous histiocytes or other inflammatory cells were discovered as established by electron microscopy (Figures 2C,D).

Discussion

Histopathologic findings similar to those described for the conjunctival sample above have been noted in prior reports of reactions to silicone oil [[1]]. Although the movement of silicone oil into many other intraocular structures has also been reported, a histiocytic retinal or uveal response has been either absent or severely dampened [[2]], even in eyes enucleated after a decade with oil, except in cases with massive fibrovascular responses [[3]]. There is no earlier published case detailing silicone impregnation of a fibrous retroprosthetic membrane. Such membranes have been shown to arise from corneoscleral stromal downgrowth [[4]], but the potential effect of silicone oil in accelerating or worsening the development of a retroprosthetic membrane must be considered. Some reports have documented the alleged ability of silicone oil to promote the formation of preretinal membranes [[5],[6]]. There is at least one study describing the increased concentrations of fibrogenic growth factors in the setting of intraocular silicone oil [[6]].
One can speculate whether the increased intraocular pressure that the eye experienced may have played a role in forcing silicone oil droplets into the retroprosthetic membrane. The divergence of histological responses to the presence of silicone oil in the conjunctiva versus the retroprosthetic membrane provides a demonstration of the eye's apparent retained capacity to protect against intraocular inflammation, despite multiple previous surgeries.

Authors' information

AG is a resident in Ophthalmology. FJ is a former Chief of Ophthalmology and current Director of Ophthalmic Pathology. JC is the Associate Director of the Cornea and Refractive Surgery Service, Director of Boston Keratoprosthesis Clinical Programs, and Director of Education and Fellowship training for the Cornea Service. DE is the Associate Director of the Retina Service.
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.
The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.

Competing interests

The authors declare that they have no competing interests.

Authors' contributions

AG facilitated the processing and review of all tissue samples, performed the literature review, and drafted the original manuscript. FJ conceived of the paper, reviewed the pathology, and helped to develop the manuscript. JC was one of the surgeons involved in the patient's care, and he provided case history and contributed to the editing of the manuscript. DE was one of the surgeons involved in the patient's care, and he obtained tissue samples, provided case history, and contributed to the editing of the manuscript. All authors read and approved the final manuscript.
Anhänge

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Metadaten
Titel
A comparison of retrokeratoprosthetic membrane and conjunctival inflammatory responses to silicone oil
verfasst von
Aubrey L Gilbert
Frederick A Jakobiec
James Chodosh
Dean Eliott
Publikationsdatum
01.12.2014
Verlag
Springer Berlin Heidelberg
Erschienen in
Journal of Ophthalmic Inflammation and Infection / Ausgabe 1/2014
Elektronische ISSN: 1869-5760
DOI
https://doi.org/10.1186/s12348-014-0015-y

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