Intraretinal worm documented by optical coherence tomography in a patient with diffuse unilateral subacute neuroretinitis: case report

Cunha, Leonardo Provetti; Costa-Cunha, Luciana Virgínia Ferreira; Souza, Eduardo Cunha de; Monteiro, Mário Luiz Ribeiro

doi:10.1590/s0004-27492010000500015

Cited by 9 publications

(2 citation statements)

References 8 publications

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“…Casella et al reported the presence of RNFL atrophy even in patients with good visual acuity [8]. Cunha et al reported an intraretinal worm using a Stratus OCT [9]. …”

Section: Discussionmentioning

confidence: 99%

Spectral Domain Optical Coherence Tomography in Diffuse Unilateral Subacute Neuroretinitis

Filho

Soares

Penha

et al. 2011

Journal of Ophthalmology

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Purpose. To describe the SD-OCT findings in patients with diffuse unilateral subacute neuroretinitis (DUSN) and evaluate CRT and RNFL thickness. Methods. Patients with clinical diagnosis of DUSN who were submitted to SD-OCT were included in the study. Complete ophthalmologic examination and SD-OCT were performed. Cirrus scan strategy protocols used were 200 × 200 macular cube, optic nerve head cube, and HD-5 line raster. Results. Eight patients with DUSN were included. Mean RNFL thickness was 80.25 μm and 104.75 μm for affected and normal eyes, respectively. Late stage had mean RNFL thickness of 74.83 μm compared to 96.5 μm in early stage. Mean CMT was 205.5 μm for affected eyes and 255.13 μm for normal fellow eyes. Conclusion. RNFL and CMT were thinner in DUSN eyes compared to normal eyes. Late-stage disease had more pronounced thinning compared to early-stage patients. This thinning in RNFL and CMT may reflect the low visual acuity in patients with DUSN.

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“…Casella et al reported the presence of RNFL atrophy even in patients with good visual acuity [8]. Cunha et al reported an intraretinal worm using a Stratus OCT [9]. …”

Section: Discussionmentioning

confidence: 99%

Spectral Domain Optical Coherence Tomography in Diffuse Unilateral Subacute Neuroretinitis

Filho

Soares

Penha

et al. 2011

Journal of Ophthalmology

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“…Cunha et al 16 were able to demonstrate a parasite in the inner retinal layers using Stratus OCT. Garcia Filho et al 15 were able to perform a B-scan OCT over the area in which the worm was located identifying an intraretinal hypereflectivity corresponding to the presence of the worm and the surrounding inflammation. Whether the parasite is restricted to the inner retina or travels freely in different layers is uncertain.…”

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confidence: 99%

Imaging in the Diagnosis and Management of Diffuse Unilateral Subacute Neuroretinitis

Filho¹,

Garcia²,

Arévalo³

2012

International Ophthalmology Clinics

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DUSN is an ocular inflammatory syndrome described by Gass 1 in 1977, and initially called the ''unilateral wipe-out syndrome.'' Later, the term ''diffuse unilateral subacute neuroretinitis'' was introduced and the presence of an intraocular nematode as a causative agent was reported. 2,3 Different sized parasites have been reported as possible etiologic agents of DUSN, including Ancilostoma caninum and Baylissascaris procyonis, however, these reports did not present conclusive evidence of a specific agent. [3][4][5] DUSN is usually unilateral, although bilateral disease has been reported, 6,7 tends to occur in children and young adults, and can lead to severe visual loss if left untreated. The mean age of DUSN patients is16.7 years, with >83% of patients being younger than 20 years. 7 The clinical course of DUSN was described by Gass and Scelfo. 2 The disease has 2 different stages: an early stage characterized by decreased visual acuity, papilitis, multifocal yellow-white lesions, vitritis, and vasculitis (Figs. 1, 2); and a late stage characterized by decreased visual acuity, mild vitritis, diffuse or focal retinal epithelial damage, optic nerve atrophy, retinal vessel narrowing, presence of small white spots (probable exudation residue), and the presence of subretinal tracks, suggesting remnants of larvae migration in the subretinal space (Fig. 3). 2,3,8,9 More recently, Garcia Filho and colleagues reported 121 patients with the clinical diagnosis of DUSN. Most patients presented in the late stage of the disease (92.6%) and the most prevalent clinical features were the presence of subretinal tracks (91.7%), focal alterations of the retinal pigmented epithelium (RPE) (89.3%), small white spots

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Ocular Parasitic Infections

Rathinam

Kamath²

2016

Uveitis: An Update

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Intraretinal worm documented by optical coherence tomography in a patient with diffuse unilateral subacute neuroretinitis: case report

Cited by 9 publications

References 8 publications

Spectral Domain Optical Coherence Tomography in Diffuse Unilateral Subacute Neuroretinitis

Spectral Domain Optical Coherence Tomography in Diffuse Unilateral Subacute Neuroretinitis

Imaging in the Diagnosis and Management of Diffuse Unilateral Subacute Neuroretinitis

Ocular Parasitic Infections

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