OPHTHALMIC IMAGE
Year : 2019 | Volume
: 67 | Issue : 9 | Page : 1477-
Ophthalmological signet ring sign by a glaucoma implant
Sunny Chi Lik Au, Simon Tak Chuen Ko Department of Ophthalmology, Tung Wah Eastern Hospital, Hong Kong, HKSAR, Hong Kong
Correspondence Address:
Dr. Sunny Chi Lik Au Department of Ophthalmology, 9/F, MO Office, Lo Ka Chow Memorial Ophthalmic Centre, Tung Wah Eastern Hospital, 19 Eastern Hospital Road, Causeway Bay Hong Kong
How to cite this article:
Au SC, Ko ST. Ophthalmological signet ring sign by a glaucoma implant.Indian J Ophthalmol 2019;67:1477-1477
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How to cite this URL:
Au SC, Ko ST. Ophthalmological signet ring sign by a glaucoma implant. Indian J Ophthalmol [serial online] 2019 [cited 2024 Mar 28 ];67:1477-1477
Available from: https://journals.lww.com/ijo/pages/default.aspx/text.asp?2019/67/9/1477/265118 |
Full Text
A 58-year-old man with right eye uveitic glaucoma was successfully implanted an Ahmed valve (New World Medical, Rancho Cucamonga, CA, USA) to control his intraocular pressure. Glaucoma drainage device, with increasing popularity,[1] would show up on radiological imaging,[2] and be mistaken as foreign body,[3] especially with its size, superior location to the eye,[4] and heterogeneous radiodensity throughout. The Ahmed valve appears as a signet ring on computed tomography [Figure 1]. The difference in radiodensity of the polypropylene body from the remaining silicone part outlines its ring-shaped appearance. This is more obvious especially with 3D reconstruction [Figure 2], making it a signature of glaucoma implant.{Figure 1}{Figure 2}
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
Financial support and sponsorship
Nil.
Conflicts of interest
There are no conflicts of interest.
References
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