Intraocular silicone oil for retinal detachment in AIDS: CT and MR appearances. NLM AIDSLINE Important note: Information in this article was accurate in 1996. The state of the art may have changed since the publication date.

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Intraocular silicone oil for retinal detachment in AIDS: CT and MR appearances.

Clin Radiol. 1996 Jun;51(6):415-7. Unique Identifier : AIDSLINE MED/96262157
Murray JG; Gean AD; Barr RM; Department of Radiology, San Francisco General Hospital, USA.

Abstract: AIM: To describe the CT and MR features of intraocular silicone oil which is used to treat complex retinal detachments in patients with acquired immune deficiency syndrome (AIDS). PATIENTS AND METHODS: Seven male patients with AIDS were treated by pars plana vitrectomy and intraocular silicone oil injection for complex retinal detachments due to biopsy proven cytomegalovirus retinitis. Two patients had bilateral therapy. RESULTS: Silicone oil was hyperdense to muscle on CT with attenuation values of 106-139 HU (mean 115, SD 4.5). On MR, when compared with normal vitreous, intraocular silicone oil appeared hyperintense on T1-, proton density, and T2-weighted spin-echo sequences. A chemical shift artifact was seen on all MR images, being most marked on the T2-weighted images. CONCLUSION: The high attenuation value of silicone oil on CT and its hyperintensity on T1 weighted MR images my cause diagnostic confusion with haemorrhage. These entities can be distinguished at CT by directly measuring the attenuation number (silicone oil > 100 HU; blood < 90 HU), and at MR by the presence of a chemical shift artifact.
Keywords: Acquired Immunodeficiency Syndrome/*COMPLICATIONS/PATHOLOGY/ RADIOGRAPHY Adult Diagnosis, Differential Eye Hemorrhage/RADIOGRAPHY Human Magnetic Resonance Imaging Male Middle Age Polymers/*ADMINISTRATION & DOSAGE/THERAPEUTIC USE Retinal Detachment/COMPLICATIONS/RADIOGRAPHY/*THERAPY Silicones/*ADMINISTRATION & DOSAGE/THERAPEUTIC USE Vitrectomy JOURNAL ARTICLEKWDacquiredimmunodeficiencysyndrome/KWDcomplications/pathology/radiographyadultdiagnosis,differentialeyehemorrhage/radiographyhumanmagneticresonanceimagingmalemiddleagepolymers/KWDadministration&dosage/therapeuticuseretinaldetachment/complications/radiography/KWDtherapysilicones/KWDadministration&dosage/therapeuticusevitrectomyjournalarticle
961030
M96A1380

Copyright © 1996 - National Library of Medicine. Reproduced under license with the National Library of Medicine, Bethesda, MD.

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