Annals of Indian Academy of Neurology
LETTER TO THE EDITOR
Year
: 2022  |  Volume : 25  |  Issue : 1  |  Page : 142--143

Multicolor imaging characteristics of peripapillary wrinkles in idiopathic intracranial hypertension


Sweksha Priya1, Md Shahid Alam2,  
1 Departments of Pediatric Ophthalmology and Neuroophthalmology, Aditya Birla Sankara Nethralaya (A Unit of Medical Research Foundation, Chennai), Kolkata, West Bengal, India
2 Orbit, Oculoplasty, Reconstructive and Aesthetic Services, Aditya Birla Sankara Nethralaya (A Unit of Medical Research Foundation, Chennai), Kolkata, West Bengal, India

Correspondence Address:
Md Shahid Alam
Department of Orbit, Oculoplasty, Reconstructive and Aesthetic Services, Aditya Birla Sankara Nethralaya, Kolkata - 700 099, West Bengal
India




How to cite this article:
Priya S, Alam MS. Multicolor imaging characteristics of peripapillary wrinkles in idiopathic intracranial hypertension.Ann Indian Acad Neurol 2022;25:142-143


How to cite this URL:
Priya S, Alam MS. Multicolor imaging characteristics of peripapillary wrinkles in idiopathic intracranial hypertension. Ann Indian Acad Neurol [serial online] 2022 [cited 2022 Jul 2 ];25:142-143
Available from: https://www.annalsofian.org/text.asp?2022/25/1/142/326011


Full Text



Dear Editor,

Peripapillary wrinkle (PPW) also known as Paton's line is an important clinical finding in cases of idiopathic intracranial hypertension (IIH). There is a possibility of PPWs getting missed on routine fundus examination and colored fundus photography (CFP). We herewith report a case of IIH in which the PPWs were picked up on multicolor imaging (MCI) which was otherwise missed on CFP. To the best of the authors' knowledge, this is the first report describing the MCI characteristics of PPWs.

A 34-year-old woman who was a diagnosed case of IIH was referred by the neurologist for a complete neuro-ophthalmic work-up. Her best-corrected visual acuity in both eyes was 20/20 with normal color vision and normally reacting pupils. Her anterior segment examination was within normal limits. Fundus examination showed resolving disc edema in both the eyes with very mild obscuration of vessels at the disc margin. Color fundus photograph (CFP) of the right eye showed subtle obscuration of vessels [Figure 1]a. However composite image of MCI showed fine greenish hyper-reflective radial PPWs arising from the disc in the right eye [Figure 1]b which was more pronounced in the blue reflectance (BR) image [Figure 1]c. Optical coherence tomography (OCT) of the right eye did not reveal any retinal folds [Figure 1]d. CFP of the left eye showed mild obscuration of the vessels at the disc margin [Figure 2]a. However composite MCI displayed greenish hyper-reflective radial and concentric PPW arising from the disc and its temporal portion respectively [Figure 2]b, which were more pronounced in BR images [Figure 1]c. These temporal concentric PPWs in the left eye were well picked up by the OCT as tightly packed projections in retinal nerve fiber layer [Figure 1]d. The findings were documented and the patient was referred back to the neurologist along with all relevant findings for further management.{Figure 1}{Figure 2}

Chorio-retinal folds are well known to be associated with IIH. These folds are clinical manifestations of stress and strain on the optic nerve head and the surrounding structure induced by raised intracranial tension.[1] Although these folds are pronounced in cases with severe papilloedema, they can be seen even with mild or no papilloedema.[2] Sibony et al.[3] described four types of folds in IIH patients––PPWs also referred to as Paton's line, outer retinal folds (ORFs), inner retinal folds (IRF) and choroidal folds (CF). They also described the association between the type of folds and structural parameters of optic nerve head. PPWs were found to be associated with higher grade of papilloedema; CF with anterior deformation of peripapillary retinal pigment epithelium/basement membrane layer, while RF were found to be associated with both.[4]

The major ocular morbidity associated with IIH is loss of visual function. Although the vision loss is mild in approximately 86% of case, approximately 10% of cases can develop profound visual loss.[5] These folds are indicative of increasing stress on the optic nerves and might serve as an indicator for intervention or change in the ongoing management.[1]

Sibony et al.[3] reported that these folds could be detected in only 43% of the cases using CFP possibly due to slight offset in the photographic plane of focus or obscuration of folds by superficial nerve fiber layer edema. Spectral-domain OCT (SD-OCT) appears to be more sensitive in detecting folds than CFP but SD-OCT is prone to artifacts (irregular shadow of blood vessels, small z-axis movement of eye) which may simulate folds.[3]

MCI is a non-invasive retinal imaging technique available in the Spectralis OCT platform (Heidelberg Engineering, Heidelberg Germany). It simultaneously acquires three reflectance images using three different lasers and a composite multicolor image is produced for analysis.

MCI characteristics of PPWs have never been described in the literature. In composite MCI images they appear as greenish hyper-reflective fine radial folds arising from the disc radially (radial PPW) [Figure 1]b and [Figure 2]b and relatively broader greenish hyper-reflective folds concentric to the optic disc mostly located temporally (concentric PPW) [Figure 2]b. These PPWs are best seen in BR images as it best focuses on inner retina and vitreo-retinal interface [Figure 1]c and [Figure 2]c. The present report highlights the potential of MCI in detecting and delineating PPWs better than CFP and OCT. MCI can be considered as a future imaging tool for retinal imaging in cases of IIH.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.

References

1Friberg TR. The etiology of choroidal folds. A biomechanical explanation. Graefes Arch Clin Exp Ophthalmol 1989;227:459-64.
2Jacobson DM. Intracranial hypertension and the syndrome of acquired hyperopia with choroidal folds. J Neuroophthalmol 1995;15:178-85.
3Sibony PA, Kupersmith MJ, OCT substudy group of the NORDIC idiopathic intracranial hypertension treatment trial. “Paton's Folds” revisited: Peripapillary wrinkles, folds, and creases in papilledema. Ophthalmology 2016;123:1397-9.
4Sibony PA, Kupersmith MJ, Feldon SE, Wang J-K, Garvin M, OCT substudy group for the NORDIC idiopathic intracranial hypertension treatment trial. Retinal and choroidal folds in papilledema. Invest Ophthalmol Vis Sci 2015;56:5670-80.
5Wall M, George D. Idiopathic intracranial hypertension: A prospective study of 50 patients. Brain 1991;114:155-80.