85 results on '"Prithvi Ramtohul"'
Search Results
2. Quantitative assessment of choriocapillaris flow deficits and type 1 macular neovascularization growth in age-related macular degeneration
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Diogo Cabral, Ana C. Fradinho, Yi Zhang, Hao Zhou, Prithvi Ramtohul, Meera S. Ramakrishnan, Telmo Pereira, Ruikang K. Wang, and K. Bailey Freund
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Medicine ,Science - Abstract
Abstract During the past 15 years, new treatment paradigms for neovascular age-related macular degeneration (nvAMD) have evolved due to the advent of intravitreal anti-vascular endothelial growth factor (VEGF) therapy and rapid advances in retinal imaging. Recent publications describe eyes with type 1 macular neovascularization (MNV) as showing more resistance to macular atrophy than eyes with other lesion types. We sought to explore whether the perfusion status of the native choriocapillaris (CC) surrounding type 1 MNV influences its pattern of growth. To evaluate this effect, we analyzed a case series of 22 eyes from 19 nvAMD patients with type 1 MNV exhibiting growth on swept-source optical coherence tomography angiography (SS-OCTA) over a minimum follow-up of 12 months. We observed an overall weak correlation between type 1 MNV growth and CC flow deficits (FDs) average size (τ = 0.17, 95% CI [− 0.20, 0.62]) and a moderate correlation with CC FD % (τ = 0.21, 95% CI [− 0.16, 0.68]). Type 1 MNV was located beneath the fovea in most of the eyes (86%) and median visual acuity was 20/35 Snellen equivalent. Our results support that type 1 MNV recapitulates areas of CC blood flow impairment while serving to preserve foveal function.
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- 2023
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3. Inverted internal limiting membrane flap technique versus complete internal limiting membrane peeling in large macular hole surgery: a comparative study
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Prithvi Ramtohul, Eric Parrat, Danièle Denis, and Umberto Lorenzi
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Internal limiting membrane ,Inverted ILM flap technique ,ILM peeling ,Macular hole ,Vitrectomy ,Ophthalmology ,RE1-994 - Abstract
Abstract Background To compare the anatomical and functional outcomes of the inverted internal limiting membrane (ILM) flap technique and the complete ILM removal in the treatment of large stage 4 macular hole (MH) > 400 μm and to evaluate reconstructive anatomical changes in foveal microstructure using spectral-domain optical coherence tomography. Methods This is a retrospective, consecutive, nonrandomized comparative study of patients affected by idiopathic, myopic or traumatic stage 4 MH (minimum diameter > 400 μm) treated with 25-gauge pars-plana vitrectomy with either complete ILM peeling (n = 23, Group 1) or inverted ILM flap technique (n = 23, Group 2), between August 2016 and August 2018. Main outcomes measured were the MH closure rate assessed by spectral-domain optical coherence tomography and the best-corrected visual acuity (BCVA) at six months. Foveal microstructure reconstructive changes were evaluated using SD-OCT to determine predictive factors of postoperative BCVA. Results Closure of MH was achieved in 16/23 cases of Group 1 (70%) and in 22/23 cases of the Group 2 (96%). Surgical failure was reported in 6 cases of Group 1 and 1 case of Group 2. The MH closure rate was significantly higher with the inverted ILM flap technique (P-value = 0.02). Average BCVA (LogMAR) changed from 1.04 ± 0.32 to 0.70 ± 0.31 in Group 1 and from 0.98 ± 0.22 to 0.45 ± 0.25 in Group 2 (P-value = 0.005) at 6 months. Improvement in BCVA (> 0.3 LogMAR units) was statistically higher in the Group 2 (P-value = 0.03). Restoration of foveal microstructure was significantly higher in the Group 2 at 6 months (52% vs 9%, P-value 400 μm, improving both anatomical and functional outcomes. Early recovery of the external limiting membrane at 3 months is a positive predictive value of postoperative BCVA 6 months after inverted ILM flap technique.
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- 2020
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4. Pigmented paravenous retinochoroidal atrophy associated with Vogt-Koyanagi-Harada disease: a case report
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Prithvi Ramtohul, Alban Comet, Pierre Gascon, and Danièle Denis
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Pigmented paravenous retinochoroidal atrophy ,Retinitis pigmentosa ,Spectral domain optical coherence tomography ,Vogt-Koyanagi-Harada ,Ophthalmology ,RE1-994 - Abstract
Abstract Background To describe a unique case of pigmented paravenous retinochoroidal atrophy that developed several years after Vogt-Koyanagi-Harada disease. Case presentation A 28-year-old woman presented with gradual vision loss in both eyes and nyctalopia for 2 years. Past medical history was relevant for Vogt-Koyanagi-Harada disease since the age of 19 and positive HLA-DR4. Funduscopic examination revealed perivascular pigmentary clumping and atrophic changes radiating from the optic disks. Spectral domain optical coherence tomography through the macula demonstrated perifoveal outer retinal layers loss with cystic degeneration. Fundus autofluorescence showed zonal areas of hypoautofluorescence corresponding to the areas of atrophy. Full-field electroretinogram identified mildly reduced scotopic and photopic responses. The patient was diagnosed with pigmented paravenous retinochoroidal atrophy. Conclusions Pigmented paravenous retinochoroidal atrophy may be acquired after Vogt-Koyanagi-Harada disease. Pathogenesis of pigmented paravenous retinochoroidal atrophy may involve inflammatory-related precursors on a background of genetic predisposition.
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- 2020
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5. Decompression retinopathy following nonpenetrating deep sclerectomy for primary congenital glaucoma
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Prithvi Ramtohul, Maëva Chardavoine, Marie Beylerian, Aurore Aziz, Frédéric Matonti, and Danièle Denis
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Congenital glaucoma ,Decompression retinopathy ,Deep sclerectomy ,Subhyaloid hemorrhage ,Trabeculotomy ,Vitrectomy ,Ophthalmology ,RE1-994 - Abstract
Abstract Background To describe a unique case of decompression retinopathy manifesting as pre-macular subhyaloid hemorrhage that occurs in a nine-day old child after undergoing a non-penetrating deep sclerectomy for primary congenital glaucoma. Case presentation We report a single case of a 9-day-old boy who was referred to our department of ophthalmology for bilateral buphtalmia and corneal edema. He presented marked elevation of the intraocular pressure in both eyes (22 mmHg and 26 mmHg, in the right eye and left eye respectively) associated with significant optic nerve cupping. Non-penetrating deep sclerectomy was performed for each eye, with effective reduction of the intraocular pressure during the first week postoperatively (11 mmHg and 7 mmHg in the right eye and left eye respectively). The right eye presented an isolated subhyaloid hemorrhage located in the pre-macular area, persisting 3 weeks after the initial surgery and requiring pars-plana vitrectomy to clear the visual axis. This uncommon complication was identified as decompression retinopathy. The intraocular pressure remained controlled in the normal range three years after initial surgery in both eyes, with reversal of optic disc cupping. Conclusions Decompression retinopathy is a potential complication after non-penetrating deep sclerectomy in primary congenital glaucoma, requiring prompt treatment strategy to prevent potential organic amblyopia.
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- 2018
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6. Vitelliform maculopathy: Diverse etiologies originating from one common pathway
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Claudio Iovino, Prithvi Ramtohul, Adrian Au, Veronica Romero-Morales, SriniVas Sadda, K Bailey Freund, David Sarraf, Iovino, Claudio, Ramtohul, Prithvi, Au, Adrian, Romero-Morales, Veronica, Sadda, Sriniva, Freund, K Bailey, and Sarraf, David
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Ophthalmology - Published
- 2023
7. Volume Rendering of Deep Retinal Age-Related Microvascular Anomalies
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Diogo Cabral, Prithvi Ramtohul, Ana C. Fradinho, and K. Bailey Freund
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Ophthalmology ,Visual Acuity ,Humans ,Fluorescein Angiography ,Atrophy ,Tomography, Optical Coherence ,Retina ,Retrospective Studies - Abstract
To characterize and distinguish non-neovascular deep retinal age-related microvascular anomalies (DRAMA) from type 3 macular neovascularization (MNV) using volume rendering of OCT and OCT angiography (OCTA).Retrospective, consecutive case series.Consecutive patients with age-related macular degeneration (AMD) exhibiting de novo non-neovascular abnormalities within the deep vascular plexus (DCP), as detected using high-resolution (High-Res) spectral-domain (SD) and swept-source (SS) OCT or OCTA. Patients with retinal vascular alterations attributable to other disease entities were excluded.Complete ophthalmic examination and multimodal imaging, including confocal fundus photography (CFP), SD-OCT, High-Res SD-OCT and OCTA, and volume-averaged SS-OCTA. The volume renderings of High-Res OCTA and averaged SS-OCTA were used to analyze capillary abnormalities and inflow or outflow connectivity pathways.The primary outcomes were the characteristics of capillary abnormalities (number, size, shape, reflectivity, and location) and inflow or outflow connectivity pathways. The secondary outcomes were nearby changes in CFP and structural OCT (hyperreflective foci [HRF], outer retinal atrophy, and retinal pigment epithelium [RPE] atrophy).From 8 eyes of 8 patients, 2 subtypes of DRAMA were identified: small-diameter perifoveal capillary dilations with hyperreflective walls within the inner nuclear layer (type 1, n = 4) and vascular outpouchings, typically multiple, extending posteriorly into the Henle fiber layer, with reflectivity similar to adjacent normal retinal capillaries (type 2, n = 10). Four eyes had both subtypes of DRAMA. The 3-dimensional visualization of OCTA data demonstrated DRAMA corresponding to the dilations of DCP capillaries without direct inflow or outflow connections to the superficial plexus. Fundus photographs showed circular red dots in 3 eyes, all corresponding to type 1 DRAMA. In all the cases, DRAMA colocalized with HRF. No lesions were found anterior to the areas of the RPE or outer retina atrophy. Asymptomatic intraretinal exudation varied through a follow-up duration of up to 6 years, with no lesions progressing to type 3 MNV.In eyes with non-neovascular AMD, DRAMA include 2 types of capillary dilations occurring without the remodeling of the surrounding vascular network. Deep retinal age-related microvascular anomalies can resemble microvascular changes due to other causes and can masquerade as type 3 MNV. Mild intraretinal exudation can vary during follow-up, without progression to type 3 MNV.
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- 2022
8. Stellate Multiform Amelanotic Choroidopathy (SMACH). Clinical and Multimodal Imaging Features
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Prithvi Ramtohul, Marco Pellegrini, Francesco Pichi, Chiara Preziosa, Alessandro Marchese, Maria Vittoria Cicinelli, Elisabetta Miserocchi, Rusdeep Mundae, Sarah Mrejen, Soraya Rofagha, Calvin E. Mein, Luke Mein, Michael D. Ober, Eduardo Cunha de Souza, Salomon Yves Cohen, Elon H. C. van Dijk, Lee Jampol, Camiel J. F. Boon, and K. Bailey Freund
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Ophthalmology ,General Medicine - Published
- 2023
9. LONG-TERM PRESERVATION OF VISUAL ACUITY AFTER RESORPTION OF ACQUIRED VITELLIFORM LESIONS IN AGE-RELATED MACULAR DEGENERATION
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Prithvi Ramtohul and K. Bailey Freund
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Ophthalmology ,General Medicine - Published
- 2023
10. The Chrysanthemum Phenotype of Idiopathic Multifocal Choroiditis
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Prithvi Ramtohul, Maria Vittoria Cicinelli, Rosa Dolz-Marco, Orly Gal-Or, Sarah Mrejen, Jesús R García-Martínez, Alla Goldberg, Eduardo Cunha de Souza, Elisabetta Miserocchi, Emmett T. Cunningham, Lawrence A. Yannuzzi, K. Bailey Freund, and Edmund Tsui
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Ophthalmology ,General Medicine - Published
- 2023
11. ARE THERE TWO FORMS OF MULTIPLE EVANESCENT WHITE DOT SYNDROME?
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K. Bailey Freund, Prithvi Ramtohul, Aliaa H Abdelhakim, Federica Turchi, Tommaso Bacci, Lawrence A. Yannuzzi, and Juliet Essilfie
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Adult ,Indocyanine Green ,Male ,medicine.medical_specialty ,genetic structures ,Multiple evanescent white dot syndrome ,Computed Tomography Angiography ,Visual Acuity ,Retinal Pigment Epithelium ,Vitreoretinal Surgery ,Multimodal Imaging ,Young Adult ,Optical coherence tomography ,Multifocal choroiditis ,Punctate inner choroidopathy ,Secondary MEWDS ,Ophthalmology ,Photography ,medicine ,Humans ,Fluorescein Angiography ,Coloring Agents ,Dioptre ,Retinal pigment epithelium ,White Dot Syndromes ,medicine.diagnostic_test ,Choroid ,business.industry ,Multifocal Choroiditis ,Retinal Detachment ,Retinal detachment ,General Medicine ,Optical coherence tomography angiography ,medicine.disease ,Fluorescein angiography ,eye diseases ,Posterior segment of eyeball ,medicine.anatomical_structure ,Myopia, Degenerative ,Female ,Bruch Membrane ,sense organs ,business ,Tomography, Optical Coherence - Abstract
Purpose To analyze the nature of multiple evanescent white dot syndrome (MEWDS) and differentiate an idiopathic or primary form of MEWDS from a secondary form that is seen in association with other clinical conditions affecting the posterior segment of the eye. Methods Clinical and multimodal imaging findings including color fundus photography, fundus autofluorescence, fluorescein angiography, indocyanine green angiography, spectral-domain optical coherence tomography and optical coherence tomography angiography of patients with secondary MEWDS are presented. Results Seventeen consecutive patients with secondary MEWDS were evaluated. Thirteen patients were female. Most were young adults between the ages of 20 to 40 years old with myopia (less than -6 diopters). Pathologic conditions associated to the secondary MEWDS reaction were high myopia (greater than -6 diopters) in 1 eye, prior vitreoretinal surgery for rhegmatogenous retinal detachment in 1 eye and manifestations of MFC in 15 eyes. In all eyes the MEWDS lesions followed a course of progression and resolution independent from the underlying condition. Conclusion Secondary MEWDS appears to be an epiphenomenon ("EpiMEWDS") that may be seen in association with clinical manifestations disruptive to the choriocapillaris/Bruch's membrane/retinal pigment epithelium complex.
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- 2022
12. Correspondence
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Prithvi Ramtohul, Maria Vittoria Cicinelli, and K. Bailey Freund
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Ophthalmology ,General Medicine - Published
- 2023
13. BACILLARY LAYER DETACHMENT: MULTIMODAL IMAGING AND HISTOLOGIC EVIDENCE OF A NOVEL OPTICAL COHERENCE TOMOGRAPHY TERMINOLOGY
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Eduardo Cunha de Souza, Edward Gigon, Christine A. Curcio, Ariane Malclès, Michael Engelbert, Cagri G. Besirli, Elisabetta Miserocchi, K. Bailey Freund, Giulio Modorati, and Prithvi Ramtohul
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genetic structures ,Postmortem artifact ,chemistry.chemical_compound ,Optical coherence tomography ,Retinal Rod Photoreceptor Cells ,Terminology as Topic ,Humans ,Medicine ,Multimodal imaging ,Retinal pigment epithelium ,medicine.diagnostic_test ,business.industry ,Retinal Detachment ,Retinal ,General Medicine ,Anatomy ,Macular degeneration ,medicine.disease ,eye diseases ,Ophthalmology ,medicine.anatomical_structure ,chemistry ,Retinal Cone Photoreceptor Cells ,Retinal imaging ,sense organs ,business ,Tomography, Optical Coherence ,Photoreceptor inner segment - Abstract
Purpose To clarify the histologic basis of bacillary layer detachment (BALAD) through a review of the current literature and an analysis of retinal imaging. Methods The literature for previous reports of BALAD were reviewed. An analysis of retinal images was performed to support anatomical conclusions. Results A total of 164 unique patients with BALAD on optical coherence tomography (OCT) were identified from the published literature. Twenty-two underlying etiologies, all associated with subretinal exudation, were identified. Forty-one different OCT terminologies were found. The defining OCT feature of BALAD was a split at the level of the photoreceptor inner segment myoid creating a distinctive intraretinal cavity. Resolution of BALAD was followed by a rapid restoration of the ellipsoid zone. Histology of age-related macular degeneration eyes suggests that individual photoreceptors can shed inner segments. Furthermore, detachment of the entire layer of inner segments is a common postmortem artifact. It is proposed that BALAD occurs when outwardly directed forces promoting attachment of photoreceptor outer segments to the retinal pigment epithelium exceed the tensile strength of the photoreceptor inner segment myoid. Conclusion This review serves to strengthen the OCT nomenclature "bacillary layer detachment," based on specific reflectance information obtained by OCT and previously published histologic observations.
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- 2021
14. RECURRENCE OF ACUTE RETINOPATHY IN PSEUDOXANTHOMA ELASTICUM
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Prithvi Ramtohul, Diogo Cabral, Maria Vittoria Cicinelli, and K. Bailey Freund
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Ophthalmology ,General Medicine - Published
- 2022
15. Hyperpigmented epiretinal membrane in macular telangiectasia type 2: imaging characteristics and correlation with transretinal pigment migration
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Diogo Cabral, Prithvi Ramtohul, Talia R. Kaden, Sandra Tenreiro, Miguel C. Seabra, and K. Bailey Freund
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Ophthalmology - Published
- 2022
16. Diagnostic and Therapeutic Challengess
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Prithvi Ramtohul, K. Bailey Freund, and Won Ki Lee
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Male ,medicine.medical_specialty ,Fundus Oculi ,business.industry ,Genetic Therapy ,Retinal Pigment Epithelium ,General Medicine ,Ophthalmology ,Retinal Diseases ,Electroretinography ,Humans ,Medicine ,Fluorescein Angiography ,Child ,business ,Intensive care medicine ,Tomography, Optical Coherence - Published
- 2021
17. INTRAOCULAR JARISCH–HERXHEIMER REACTION IN LEMIERRE SYNDROME
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Céline Boulicot-Seguin, Prithvi Ramtohul, and Caroline Marc
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medicine.medical_specialty ,Visual acuity ,genetic structures ,01 natural sciences ,03 medical and health sciences ,0302 clinical medicine ,Acute onset ,Blurred vision ,Ophthalmology ,medicine ,Lemierre Syndrome ,0101 mathematics ,Macular edema ,Retinal vasculitis ,business.industry ,010102 general mathematics ,Jarisch–Herxheimer reaction ,General Medicine ,medicine.disease ,eye diseases ,030221 ophthalmology & optometry ,sense organs ,medicine.symptom ,Ranibizumab ,business ,medicine.drug - Abstract
Purpose To report an intraocular Jarisch-Herxheimer reaction induced by Lemierre syndrome antibiotherapy. Methods Case report. Results A 43-year-old-man presented with an acute onset of bilateral blurred vision few days after intravenous antibiotic administration for Lemierre syndrome. Best-corrected visual acuity was 20/32 in both eyes. Examination revealed bilateral cystoid macular edema and peripheral retinal vasculitis, persisting despite Lemierre syndrome recovery with antibiotics. Intravitreal injection of ranibizumab 0.5 mg (0.05 mL) was performed in both eyes. After 1 month, cystoid macular edema and retinal vasculitis were totally resolved, and best-corrected visual acuity increased to 20/20 in both eyes. The paradoxical worsening of the patient's best-corrected visual acuity after initiating antibiotherapy evokes a Jarisch-Herxheimer reaction. The result of this single intravitreal injection of ranibizumab was sustained; best-corrected visual acuity remained unchanged (20/20 in both eyes), and no recurrence of cystoid macular edema or retinal vasculitis was found after 4-year follow-up. Conclusion To the best of our knowledge, this is the first reported case of an isolated intraocular Jarisch-Herxheimer reaction induced by Lemierre syndrome antibiotherapy and successfully treated with a single intravitreal injection of ranibizumab.
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- 2021
18. Multimodal Imaging and Microperimetry of Retinal Pigment Epithelium Tear-Associated Resurfacing Tissue
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Prithvi Ramtohul, Diogo Cabral, and K. Bailey Freund
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Ophthalmology ,General Medicine - Published
- 2023
19. En face Ultrawidefield OCT of the Vortex Vein System in Central Serous Chorioretinopathy
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Prithvi Ramtohul, Diogo Cabral, Daniel Oh, Daniel Galhoz, and K. Bailey Freund
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Ophthalmology - Abstract
To investigate whether noninvasive en face ultrawidefield (UWF) OCT can demonstrate salient features of the choroidal vasculature in eyes with central serous chorioretinopathy (CSC).Retrospective observational case series.Patients diagnosed with CSC who underwent UWF indocyanine green angiography (ICGA) and widefield OCT imaging were included.Widefield OCT imaging was performed with a horizontal 23- × vertical 20-mm field of view of 5 visual fixations (1 central and 4 peripheral fixations) to compose structural en face UWF OCT montage images and UWF choroidal thickness maps. Automated image alignment was performed before grading.A comparison of choroidal vascular findings seen with UWF ICGA and en face UWF OCT images, including size and distribution of choroidal venous drainage areas and identification of dilated choroidal veins (pachyvessels) crossing the physiologic choroidal watershed zones. The spatial correlation between choroidal vascular hyperpermeability on UWF ICGA images and areas of choroidal thickening on UWF choroidal thickness maps was determined.Forty-two eyes from 27 patients with CSC with a mean age of 56 ± 12 years (range, 31-77 years) were included. Quantitative measures of vortex vein drainage areas on en face UWF OCT images were significantly and positively correlated with those obtained with UWF ICGA (mean Pearson r = 0.825, P0.01). Identification of pachyvessels crossing the choroidal watershed zones showed an excellent correlation between UWF ICGA and en face UWF OCT images (mean Spearman ρ = 0.873, P0.01). In all cases, choroidal vascular hyperpermeability was observed on UWF ICGA spatially colocalized with areas of choroidal thickening on the UWF choroidal thickness map. Congestion within the entire drainage area of the dominant vortex systems was observed on UWF choroidal thickness maps.In eyes with CSC, noninvasive en face UWF OCT imaging can show distinctive features of choroidal venous insufficiency previously identified with UWF ICGA. Ultrawidefield OCT choroidal thickness maps enable quantitative assessment of choroidal congestion.
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- 2022
20. PARACENTRAL ACUTE MIDDLE MACULOPATHY ASSOCIATED WITH SEVERE PLASMODIUM FALCIPARUM MALARIA
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Prithvi Ramtohul, Ismael Chehaibou, Sophie Bonnin, Ruxandra Burlacu, Alain Gaudric, and Ramin Tadayoni
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Ophthalmology ,General Medicine - Abstract
To report a case of bilateral paracentral acute middle maculopathy (PAMM) lesions on spectral domain-optical coherence tomography (SD-OCT) secondary to severe Plasmodium falciparum malaria.Retrospective case report. SD-OCT, ultra-widefield fluorescein angiography, and OCT-angiography were performed and analysed.A 54-year-old healthy man presented with acute vision loss in both eyes few days after being diagnosed with severe Plasmodium falciparum malaria. Ophthalmoscopic examination was unremarkable but near-infrared reflectance imaging showed patchy hyporeflective areas located at the terminal tips of the venous branches. Corresponding SD-OCT demonstrated alternating bands of hyperreflectivity involving the inner nuclear layer and consistent with skip PAMM lesions. OCT-angiography illustrated corresponding flow signal loss at the level of the deep capillary plexus. Ultra-widefield fluorescein angiography showed peripheral retinal vein staining and capillary non-perfusion.PAMM may be an OCT manifestation of malaria retinopathy associated with severe Plasmodium falciparum infection.
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- 2022
21. High-Resolution Spectral Domain Optical Coherence Tomography of Congenital Grouped Albinotic Spots
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Prithvi Ramtohul, Diogo Cabral, Christine A. Curcio, and K. Bailey Freund
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Ophthalmology ,Humans ,General Medicine ,Fluorescein Angiography ,Retina ,Tomography, Optical Coherence - Published
- 2022
22. PUNCTATE INNER CHOROIDOPATHY-LIKE REACTIONS IN UNRELATED RETINAL DISEASES
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Maria Vittoria Cicinelli, Alessandro Marchese, Prithvi Ramtohul, Elisabetta Miserocchi, Ugo Introini, Francesco Bandello, K. Bailey Freund, and Maurizio Battaglia Parodi
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Adult ,Male ,Choroiditis ,White Dot Syndromes ,Visual Acuity ,General Medicine ,Retinal Pigment Epithelium ,Fibrosis ,Ophthalmology ,Retinal Diseases ,Humans ,Female ,Atrophy ,Fluorescein Angiography ,Tomography, Optical Coherence ,Retrospective Studies - Abstract
To report a cohort of patients with a punctate inner choroidopathy (PIC)-like reaction in concurrent, unrelated, chorioretinal disorders.This was a retrospective observational study of patients seen at two referral centers with lesions consistent with PIC on multimodal imaging; patients with lesions resembling idiopathic multifocal choroiditis were also included. Active PIC-like lesions appeared as focal hyperreflective lesions splitting the retinal pigment epithelium/Bruch membrane (RPE/BrM) complex on optical coherence tomography. Chronic PIC-like lesions included subretinal fibrosis, multifocal punched-out chorioretinal atrophy, and curvilinear streaks. Patients' demographics, additional imaging features, and treatment responses were collected and summarized.Twenty-two eyes of 16 patients with a PIC-like reaction were included (75% females; median age 40 years). Underlying diagnoses included hereditary retinal conditions (10 patients, 63%) and acquired etiologies, all characterized by the RPE/BrM or outer retinal disruption. Fifteen eyes (68%) had active PIC-like lesions; seven eyes (32%) had chronic PIC-like lesions. Active PIC-like lesions regressed with time and responded to systemic steroids. Subretinal fibrosis (3 eyes, 20%), macular atrophy (3 eyes, 20%), and concomitant subretinal fibrosis and macular atrophy (5 eyes, 33%) developed on follow-up. Recurrences occurred in five eyes (23%).RPE/BrM or outer retina disruption may trigger a PIC-like reaction in susceptible patients, presumably because of the loss of immune privilege. A PIC-like reaction may influence the clinical progression and the visual prognosis of the primary chorioretinal disease.
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- 2022
23. Aflibercept in real-life for the treatment of age-related macular degeneration using a treat and extend protocol: The Armada study
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Prithvi Ramtohul, Alban Comet, Charles Delaporte, Danièle Denis, Pierre Gascon, and Sébastien Kerever
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Male ,0301 basic medicine ,Pediatrics ,medicine.medical_specialty ,Recombinant Fusion Proteins ,Visual Acuity ,Angiogenesis Inhibitors ,Treat and extend ,Macular Degeneration ,03 medical and health sciences ,0302 clinical medicine ,Age related ,medicine ,Humans ,In real life ,Aged ,Retrospective Studies ,Aflibercept ,Aged, 80 and over ,business.industry ,General Medicine ,Macular degeneration ,medicine.disease ,Ophthalmology ,Receptors, Vascular Endothelial Growth Factor ,Treatment Outcome ,030104 developmental biology ,Intravitreal Injections ,Wet Macular Degeneration ,030221 ophthalmology & optometry ,Female ,Treat and extend regimen ,business ,Tomography, Optical Coherence ,medicine.drug - Abstract
Purpose: To report the visual and anatomic outcomes in treatment-naïve neovascular age-related macular degeneration (nAMD) patients treated with aflibercept under a standardized Treat and Extend (T&E) protocol for up to 3 years of follow-up in “real-life” practice. Methods: This retrospective, observational, multicenter study included patients with treatment-naïve nAMD and at least 12 months of follow-up. T&E regimen adjustment was initiated after loading phase. At each visit best-corrected visual acuity (BCVA) and optical coherence tomography parameters were performed. Results: One hundred and thirty-six eyes of 115patients had at least 1 year of follow-up with 114 and 82 eyes completing at least 2 and 3 years of follow-up, respectively (mean follow-up duration: 2.7 ± 1.3 years). Mean age was 78.6 ± 8.6 years old and 52% were women. Mean BCVA increased from 60.6 ± 18.7 letters at diagnosis to 66.9 ± 16.2 letters at 1 year (+6.3 letters, p = 0.003) and remained stable throughout the follow-up period (63.1 ± 20.3 letters (+2.5, p = 0.1) and 64.0 ± 20.1 letters (+3.4, p = 0.27) at 2 and 3 years, respectively). The mean central retinal thickness decreased significantly from 358.2 ± 87.9 µm at baseline to 302 ± 71.7 µm at 12 months and maintained stable after 36 months of follow-up (297.1 ± 76 µm, p Conclusions: Our study demonstrated that intravitreal injections of aflibercept initiated under a standardized T&E for patients with treatment-naïve nAMD allow for significant visual improvement at 12 months, which was maintained over a 3-year follow-up period.
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- 2021
24. Reply
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Prithvi Ramtohul and K. Bailey Freund
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Ophthalmology ,General Medicine - Published
- 2021
25. Focal Scleral Nodule
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Chandrakumar Balaratnasingam, Rosa Dolz-Marco, Jennifer J. Arnold, R Joel Welch, Prithvi Ramtohul, Orly Gal-Or, David Sarraf, Aaron Nagiel, Sebastian M. Waldstein, Jerry A. Shields, Robert A. Lalane, Carol L. Shields, Jesse J. Jung, Adrian T. Fung, Netan Choudhry, K. Bailey Freund, Chiara Preziosa, Marco Pellegrini, Yoichi Sakurada, and Nicola G. Ghazi
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medicine.medical_specialty ,genetic structures ,Lesion ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Ophthalmology ,Medicine ,Retinal thinning ,030304 developmental biology ,0303 health sciences ,business.industry ,Nodule (medicine) ,Retinal ,eye diseases ,Sclera ,Choroiditis ,medicine.anatomical_structure ,chemistry ,030221 ophthalmology & optometry ,sense organs ,Choroid ,medicine.symptom ,business ,Optic disc - Abstract
Purpose To evaluate multimodal imaging findings of solitary idiopathic choroiditis (SIC; also known as unifocal helioid choroiditis) to clarify its origin, anatomic location, and natural course. Design Multicenter retrospective observational case series. Participants Sixty-three patients with SIC in 1 eye. Methods Demographic and clinical data were collected. Multimodal imaging included color fundus photography, OCT (including swept-source OCT), OCT angiography (OCTA), fundus autofluorescence, fluorescein and indocyanine green angiography, and B-scan ultrasonography. Main Outcome Measures Standardized grading of imaging features. Results Mean age at presentation was 56 ± 15 years (range, 12–83 years). Mean follow-up duration in 39 patients was 39 ± 55 months (range, 1 month–25 years). The lesions measured a mean of 2.4 × 2.1 mm in basal diameter, were located inferior (64%) or nasal to the optic disc, and appeared yellow (53%). No systemic associations were found. The lesions all appeared as an elevated subretinal mass, with OCT demonstrating all lesions to be confined to the sclera, not the choroid. On OCT, the deep lesion margin was visible in 12 eyes with a mean lesion thickness of 0.6 mm. Overlying choroidal thinning or absence was seen in 95% (mean choroidal thickness, 28 ± 35 μm). Mild subretinal fluid was observed overlying the lesions in 9 patients (14%). Retinal pigment epithelial disruption and overlying retinal thinning was observed in 56% and 57%, respectively. OCT angiography was performed in 13 eyes and demonstrated associated choroidal and lesional flow voids. Four lesions (6%) were identified at the macula, leading to visual loss in 1 patient. One lesion demonstrated growth and another lesion showed spontaneous resolution. Conclusions In this largest series to date, multimodal imaging of SIC demonstrated a scleral location in all patients. The yellow and white clinical appearance may be related to scleral unmasking resulting from atrophy of overlying tissues. Additional associated features included documentation of deep margin on swept-source OCT, trace subretinal fluid in a few patients, and OCTA evidence of lesional flow voids. Because of the scleral location of this lesion in every patient, a new name, focal scleral nodule, is proposed.
- Published
- 2020
26. ULTRAWIDEFIELD PSEUDOCOLOR RETINAL IMAGING VERSUS REAL-COLOR FUNDUS PHOTOGRAPHY FOR DETECTION OF INTRARETINAL PIGMENT MIGRATION IN AGE-RELATED MACULAR DEGENERATION
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Prithvi Ramtohul, Danièle Denis, Alban Comet, and Pierre Gascon
- Subjects
Male ,medicine.medical_specialty ,genetic structures ,Fundus Oculi ,0206 medical engineering ,Visual Acuity ,Retinal Pigment Epithelium ,02 engineering and technology ,Fundus (eye) ,Macular Degeneration ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Optical coherence tomography ,Ophthalmology ,medicine ,Humans ,Fluorescein Angiography ,Aged ,Retrospective Studies ,Aged, 80 and over ,Color fundus photography ,medicine.diagnostic_test ,business.industry ,Fundus photography ,Reproducibility of Results ,Retinal ,General Medicine ,Macular degeneration ,medicine.disease ,020601 biomedical engineering ,Hyperpigmentation ,eye diseases ,Ophthalmoscopy ,chemistry ,Pigment migration ,030221 ophthalmology & optometry ,Female ,sense organs ,medicine.symptom ,business ,Tomography, Optical Coherence - Abstract
PURPOSE To compare pseudocolor Optos ultrawidefield (UWF) retinal images with conventional real-color fundus photography (CFP) for detecting macular hyperpigmentary changes in intermediate age-related macular degeneration. METHODS This retrospective study included 50 patients diagnosed with intermediate age-related macular degeneration. All patients underwent Optos imaging and CFP. The overall accuracy to visualize hyperpigmentation and its morphologic features was graded by two independent readers using a standardized grid. Structural and en face optical coherence tomography images were correlated with UWF and CFP images to determine spatial correspondence of pigment clumping on fundus images and hyperreflective foci on optical coherence tomography. RESULTS One hundred eyes of 50 patients had hyperpigmentary changes on funduscopic examination and were included. The intragraders and intergraders agreements were high for all measurements (P < 0.001). At least one hyperpigmentary changes within the standardized grid was detected in 93% using CFP and 100% using UWF camera (P = 0.02). The total area of hyperpigmentation measured on UWF images was significantly higher than on CFP images (P < 0.001). There was a significant correlation between the presence of hyperpigmentary changes on both CFP and UWF images and hyperreflective foci on structural optical coherence tomography (P < 0.001). CONCLUSION Ultrawidefield fundus images allow high detection and accurate quantification of macular hyperpigmentary changes in intermediate age-related macular degeneration compared with conventional CFP.
- Published
- 2020
27. Clinical and Morphological Characteristics of Anti–Programmed Death Ligand 1–Associated Retinopathy
- Author
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K. Bailey Freund and Prithvi Ramtohul
- Subjects
0303 health sciences ,medicine.medical_specialty ,Visual acuity ,medicine.diagnostic_test ,business.industry ,Retinal vasculitis ,Cancer ,Retinal ,medicine.disease ,Fluorescein angiography ,03 medical and health sciences ,Ophthalmology ,chemistry.chemical_compound ,0302 clinical medicine ,chemistry ,Atezolizumab ,030221 ophthalmology & optometry ,medicine ,medicine.symptom ,business ,Lung cancer ,030304 developmental biology ,Retinopathy - Abstract
Purpose Immunotherapy with atezolizumab, a checkpoint inhibitor targeting the programmed cell death 1 (PD-1) axis, has shown promising results for the treatment of certain metastatic cancers. Atezolizumab-associated acute macular neuroretinopathy (AMN) with retinal venulitis is a newly reported immune-related adverse event (irAE) that further expands the range of adverse effects associated with checkpoint inhibitor therapy. We describe the clinical course and imaging findings of a similar AMN-like retinopathy after treatment with atezolizumab. Design Retrospective case series. Participants Three patients treated with atezolizumab for metastatic breast cancer (n = 1) and non–small-cell lung cancer (n = 2). Methods Inclusion criterion was a clinical diagnosis of AMN-like retinopathy with or without retinal vasculitis after atezolizumab administration. Main Outcome Measures Clinical course and multimodal retinal imaging including color photographs, spectral-domain OCT, near-infrared reflectance, and fluorescein angiography were investigated. Results Three patients (1 woman and 2 men; mean age, 51 years) experienced the acute onset of reduced visual acuity and paracentral scotomas 2 weeks after their first infusion of atezolizumab. Visual symptoms corresponded to focal areas of pericentral photoreceptor disruption in all cases. In 1 patient imaged with fluorescein angiography, focal segments of retinal venulitis were detected. After treatment cessation, incomplete visual recovery was related to persistent photoreceptor damage. All patients died of their cancer within 6 months after the onset of retinopathy. Conclusions To our knowledge, there are 3 previously published cases of atezolizumab-associated AMN with retinal vasculitis. This series of 3 similar cases strengthens the association of programmed death ligand 1 (PD-L1) inhibition with this rare form of retinopathy that was termed “anti–PD-L1–associated retinopathy.” This irAE seems to be a consistent occurrence in the second week postadministration with lasting structural and functional deficits seen after treatment cessation. Pathophysiologic mechanisms may include loss of tolerance in an immune-privileged organ and subsequent development of T-cell–driven inflammation. In this emerging field, expanding the spectrum and pathogenesis of irAEs is essential to define strategies for prevention, early detection, and appropriate management.
- Published
- 2020
28. Central Acute Middle Maculopathy
- Author
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Prithvi Ramtohul and K. Bailey Freund
- Subjects
0303 health sciences ,medicine.medical_specialty ,genetic structures ,business.industry ,medicine.disease ,eye diseases ,Hypoplasia ,03 medical and health sciences ,Ophthalmology ,0302 clinical medicine ,Foveal ,030221 ophthalmology & optometry ,medicine ,Maculopathy ,sense organs ,business ,030304 developmental biology - Abstract
To report a unique variant of paracentral acute middle maculopathy occurring in combination with foveal hypoplasia and termed central acute middle maculopathy.
- Published
- 2020
29. Soft drusen accumulation within a full-thickness macular hole: new insights into the mechanisms of lipid cycling pathways in age-related macular degeneration
- Author
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Prithvi Ramtohul, Diogo Cabral, James M. Klancnik, Christine A. Curcio, and K. Bailey Freund
- Subjects
Ophthalmology ,Macular Degeneration ,Humans ,Retinal Drusen ,Fluorescein Angiography ,Retinal Perforations ,Lipids ,Tomography, Optical Coherence - Published
- 2022
30. Clinical and Morphologic Characteristics of Perivenular Fernlike Leakage on Ultrawide-field Fluorescein Angiography
- Author
-
Prithvi Ramtohul, Claudio Iovino, Adrian Au, Tommaso Bacci, Francesco Pichi, Giulia Corradetti, Federico Corvi, Niranjan Manoharan, Alejandro Itzam Marin, Ramin Tadayoni, SriniVas Sadda, K. Bailey Freund, and David Sarraf
- Subjects
Ophthalmology ,Fernlike leakage ,Multimodal imaging ,Retinal Vein Occlusion ,Humans ,Fluorescein angiography ,Fluorescein Angiography ,Retinal Vein ,Tomography, Optical Coherence ,Retrospective Studies - Abstract
To analyze the spectrum of the perivenular fernlike leakage on ultrawide-field fluorescein angiography (UWFA) and discuss its potential implications in the current understanding of the retinal venous outflow.Retrospective, observational case series.Eyes presenting with fernlike patterns of dye leakage on UWFA were included in this study.Analysis of the clinical characteristics and multimodal imaging findings using UWFA and wide-angle swept-source OCT-angiography (SS-OCTA).The disease spectrum, anatomic origin, and clinical implications of this fernlike leakage.Multimodal retinal images from 40 eyes of 29 patients with fernlike leakage on UWFA were studied. The underlying etiologies included a wide range of inflammatory disorders, including pars planitis (18 eyes) and central retinal vein occlusion (2 eyes). On UWFA, the fernlike leakage originated from the retinal capillaries and venules directly adjacent to the veins and spared the periarterial zone. This perivenular fernlike leakage involved the far periphery in all cases and progressed more diffusely and centripetally in cases with more severe intraocular inflammation. On wide-angle SS-OCTA, the impairment of deep capillary plexus (DCP) flow signals precisely colocalized with the perivenular fernlike leakages identified on UWFA.The fernlike leakage on UWFA refers to the distinctive perivenular dye leakage that originates from the retinal capillaries and venules. Multimodal imaging correlation suggests that the predominant impairment is at the level of the DCP. The axial symmetry of the fernlike leakage with the veins and sparing of the periarterial zone may support the dominant venous role of the DCP.
- Published
- 2022
31. Long-Term Outcomes of Bacillary Layer Detachment in Neovascular Age-Related Macular Degeneration
- Author
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K. Bailey Freund, Ariane Malclès, Prithvi Ramtohul, Francesco Bandello, Ugo Introini, Edward Gigon, Maria Vittoria Cicinelli, Ramtohul, P., Malclès, A., Gigon, E., Freund, K. B., Introini, U., Bandello, F., and Cicinelli, M. V.
- Subjects
Vascular Endothelial Growth Factor A ,medicine.medical_specialty ,Visual acuity ,genetic structures ,Mixed type ,Angiogenesis Inhibitors ,Neovascularization ,Macular Degeneration ,Intravitreal injection ,Ophthalmology ,Age related ,Multimodal imaging ,Long term outcomes ,Medicine ,Humans ,Fluorescein Angiography ,Retrospective Studies ,business.industry ,Proportional hazards model ,Age-related macular degeneration ,Hazard ratio ,Macular degeneration ,medicine.disease ,Fibrosis ,eye diseases ,ddc:616.8 ,Bacillary layer detachment ,Intravitreal Injections ,medicine.symptom ,business ,Tomography, Optical Coherence - Abstract
Purpose: To evaluate the clinical characteristics, multimodal imaging features, and long-term treatment outcomes of eyes with neovascular age-related macular degeneration (nAMD) and bacillary layer detachment (BALAD) treated with intravitreal anti-VEGF therapy.Design: Retrospective, longitudinal, case series.Participants: Treatment-naive patients with nAMD (n = 30) showing BALAD on OCT and undergoing anti-VEGF therapy.Methods: Clinical records and multimodal imaging results of up to 4 years after diagnosis were reviewed.Main outcome measures: Best-corrected visual acuity (BCVA) values were compared over time. The cumulative risk of and risk factors for subretinal fibrosis were assessed using Cox regression analyses, and adjusted hazard ratio (aHR) was computed.Results: Thirty eyes of 30 patients were included. Macular neovascularization (MNV) subtypes were distributed as follows: type 1, 63%; type 2, 27%; mixed type 1 and 2, 3%; type 3, 3%; aneurysmal type 1, 3%. The BCVA significantly improved after anti-VEGF loading phase (Snellen equivalent, from 20 of 118 to 20 of 71, P = 0.03), but it returned to the baseline levels at 4 years (Snellen equivalent, 20 of 103, P = 0.6). The cumulative risk of subretinal fibrosis was 77% at 4 years. The risk factors associated with subretinal fibrosis included hemorrhagic BALAD (aHR, 2.02; 95% confidence interval [CI] 1.54-3.22; P < 0.01) and the presence of subretinal hyperreflective material (aHR, 1.83; 95% CI 1.35-3.14; P < 0.01).Conclusions: BALAD was found in association with all types of MNV in patients with nAMD. Long-term observation revealed poor functional outcomes related to the high risk of subretinal fibrosis.
- Published
- 2022
32. Clinical and Morphologic Characteristics of Perivenular Fern-like Leakage on Ultra-Widefield Fluorescein Angiography
- Author
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Prithvi Ramtohul, Claudio Iovino, Adrian Au, Tommaso Bacci, Francesco Pichi, Giulia Corradetti, Federico Corvi, Niranjan Manoharan, A Itzam Marin, Ramin Tadayoni, SriniVas Sadda, K Bailey Freund, David Sarraf, Ramtohul, Prithvi, Iovino, Claudio, Au, Adrian, Bacci, Tommaso, Pichi, Francesco, Corradetti, Giulia, Corvi, Federico, Manoharan, Niranjan, Itzam Marin, A, Tadayoni, Ramin, Sadda, Sriniva, Bailey Freund, K, and Sarraf, David
- Published
- 2022
33. Reply
- Author
-
Diogo, Cabral, Prithvi, Ramtohul, Ana, Fradinho, and K Bailey, Freund
- Subjects
Ophthalmology - Published
- 2023
34. Deep Capillary Plexus Features in Acute Macular Neuroretinopathy: Novel Insights Based on the Anatomy of Henle Fiber Layer
- Author
-
Diogo, Cabral, Prithvi, Ramtohul, Luca, Zatreanu, Daniel, Galhoz, Miguel, Leitao, Vanda, Nogueira, David, Sarraf, and K Bailey, Freund
- Subjects
Adult ,Retinal Diseases ,White Dot Syndromes ,Humans ,Female ,General Medicine ,Fluorescein Angiography ,Tomography, Optical Coherence ,Retina - Abstract
The purpose of this study was to identify a precise location of deep capillary plexus (DCP) injury in acute macular neuroretinopathy (AMN) lesions using multimodal imaging.En face structural optical coherence tomography (OCT) images were manually segmented to delineate outer retinal AMN lesions involving the ellipsoid zone and interdigitation zone. AMN lesion centroid was calculated, and image distortion was applied to correct for Henle fiber layer (HFL) length and orientation. The resulting image was registered with the corresponding en face OCT angiography (OCTA) image segmented at the DCP and structural OCT volume before grading for vascular and structural features, respectively.Thirty-nine AMN lesions from 16 eyes (11 female patients, mean age 34 ± 4 years) were analyzed. After correcting for HFL anatomy, in 62% of AMN lesions, the centroid co-localized with a capillary vortex (pattern 1); flow defects were detected in 33% of lesions (pattern 2); and in 5% of lesions no specific pattern could be identified (pattern 3). The detection of a specific pattern increased after correcting the projection of AMN lesion for HFL anatomy (28% vs. 5%, P = 0.04). Outer nuclear layer thickness was lower in the centroid area in 10 (29%) AMN lesions from 6 patients, all corresponding to lesions fitting pattern 2 (r = 0.78, P0.001).AMN lesions might be a result of DCP impairment at the level of the capillary vortex or draining venule. In eyes with AMN, the location of outer retinal changes associated with DCP ischemia appears to be influenced by the length and orientation of HFL.
- Published
- 2022
35. Retromode imaging for choroidal osteoma
- Author
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Prithvi Ramtohul, Ismael Chehaibou, and Aude Couturier
- Subjects
Ophthalmology ,Choroid ,Choroid Neoplasms ,Humans ,Osteoma ,General Medicine ,Fluorescein Angiography ,Tomography, Optical Coherence - Published
- 2022
36. Case of Coats disease associated with neurofibromatosis type 1
- Author
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Alban Comet, Prithvi Ramtohul, Pierre Gascon, Danièle Denis, and Kevin Mairot
- Subjects
Ophthalmology ,medicine.medical_specialty ,business.industry ,medicine ,MEDLINE ,General Medicine ,Coats' disease ,Neurofibromatosis ,medicine.disease ,business ,Dermatology - Published
- 2021
37. PERIPHERAL RETINAL VASCULAR ABNORMALITIES IN PIGMENTED PARAVENOUS RETINOCHOROIDAL ATROPHY
- Author
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Prithvi Ramtohul, Ismael Chehaibou, and Sophie Bonnin
- Subjects
Ophthalmology ,Choroid ,Retinal Degeneration ,Humans ,Eye Diseases, Hereditary ,Atrophy ,Fluorescein Angiography ,Retinal Vein ,Retina - Published
- 2021
38. Correspondence
- Author
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Prithvi, Ramtohul
- Published
- 2021
39. LETTER TO THE EDITOR
- Author
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Prithvi Ramtohul
- Subjects
Ophthalmology ,General Medicine - Published
- 2021
40. Retinal astrocytic hamartoma vascular network on swept-source optical coherence tomography angiography
- Author
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Prithvi Ramtohul, Ismael Chehaibou, and Sophie Bonnin
- Subjects
Ophthalmology ,Retinal Diseases ,Fundus Oculi ,Hamartoma ,Humans ,Retinal Vessels ,General Medicine ,Fluorescein Angiography ,Tomography, Optical Coherence - Published
- 2021
41. Bacillary Layer Detachment in Acute Posterior Multifocal Placoid Pigment Epitheliopathy: A Multimodal Imaging Analysis
- Author
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Danièle Denis, Pierre Gascon, and Prithvi Ramtohul
- Subjects
Adult ,Multimodal imaging ,medicine.medical_specialty ,White Dot Syndromes ,Fundus Oculi ,business.industry ,Acute posterior multifocal placoid pigment epitheliopathy ,Retinal Detachment ,Retinal Pigment Epithelium ,General Medicine ,Multimodal Imaging ,Pregnancy Complications ,Ophthalmology ,Pregnancy ,Humans ,Medicine ,Female ,Fluorescein Angiography ,business ,Tomography, Optical Coherence - Published
- 2021
42. The OCT angular sign of Henle fiber layer (HFL) hyperreflectivity (ASHH) and the pathoanatomy of the HFL in macular disease
- Author
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Prithvi, Ramtohul, Diogo, Cabral, SriniVas, Sadda, K Bailey, Freund, and David, Sarraf
- Subjects
Ophthalmology ,Sensory Systems - Abstract
The Henle fiber layer (HFL) is comprised of bundles of unmyelinated photoreceptor axons intermingled with outer Müller cell processes. The photoreceptor axons extend from the cell bodies located in the outer nuclear layer and radially project toward the outer plexiform layer, the inner third of which includes the synaptic junctional complexes and the outer two-thirds of which includes the HFL. The oblique path of the HFL provides unique structural and reflectance properties and this radial anatomy is highlighted in many macular disorders including those with macular star exudation and HFL hemorrhage. Recent investigations using multimodal imaging techniques, especially cross sectional and en face optical coherence tomography (OCT), have provided new perspectives regarding HFL disruption in retinal diseases. The aim of this review is to highlight the pathoanatomy and multimodal imaging, especially OCT, associated with HFL disruption that is present in various macular diseases. After describing the current knowledge of the embryology, anatomy, and physiology of the HFL, we review the existing imaging modalities that allow in vivo visualization of the HFL in the healthy and diseased retina. Finally, we report the clinical and imaging findings of acute HFL alteration in various macular disorders, including degenerative, inflammatory, and vascular conditions. Also, we propose a novel and signature OCT biomarker indicative of acute photoreceptor disruption involving the HFL, termed the "angular sign of HFL hyperreflectivity" (ASHH) of macular disease, to unify the pathoanatomy common to these various macular disorders and to provide clarity regarding the underlying pathogenesis.
- Published
- 2022
43. Vitreous seeding of cutaneous metastastic melanoma captured by multimodal imaging
- Author
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Prithvi Ramtohul, Alban Comet, and Thierry David
- Subjects
Ophthalmology ,Skin Neoplasms ,Humans ,Melanoma ,Multimodal Imaging ,Tomography, Optical Coherence - Published
- 2022
44. Hyperacute Retinal Arterial Wall Dynamics in Embolic Paracentral Acute Middle Maculopathy
- Author
-
Danièle Denis and Prithvi Ramtohul
- Subjects
Male ,medicine.medical_specialty ,genetic structures ,Retinal Artery Occlusion ,Fundus Oculi ,Retinal Artery ,Macular Degeneration ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Optical coherence tomography ,Ophthalmology ,medicine ,Humans ,Arterial wall ,Fluorescein Angiography ,Aged ,030304 developmental biology ,0303 health sciences ,medicine.diagnostic_test ,business.industry ,Retinal ,medicine.disease ,eye diseases ,Vasodilation ,chemistry ,Acute Disease ,030221 ophthalmology & optometry ,Maculopathy ,sense organs ,business ,Tomography, Optical Coherence - Abstract
To report the hyperacute compensatory vascular responses to retinal artery occlusion using spectral-domain optical coherence tomography (SD-OCT) and OCT-Angiography (OCT-A).
- Published
- 2020
45. Anomalies congénitales de la papille
- Author
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Frédéric Matonti, J Hugo, Danièle Denis, M. Beylerian, P. Lebranchu, Prithvi Ramtohul, and A. Aziz
- Subjects
medicine.medical_specialty ,Coloboma ,genetic structures ,Morning glory disc anomaly ,business.industry ,Retinal detachment ,medicine.disease ,eye diseases ,Serous Retinal Detachment ,Hypoplasia ,Ophthalmology ,Choroidal neovascularization ,medicine.anatomical_structure ,Optic nerve ,medicine ,sense organs ,medicine.symptom ,business ,Optic disc - Abstract
Congenital abnormalities of the optic disc are not uncommon in clinical practice and should be recognized. Size abnormalities of the optic disc include optic disc aplasia, hypoplasia, megalopapilla, and optic disc cupping in prematurity. Among congenital excavations of the optic disc head, morning glory disc anomaly and optic disc pit can be complicated by serous retinal detachment; the papillorenal disc is an association of bilateral optic disc cupping and renal hypoplasia which should be ruled out; optic disc coloboma is caused by an abnormal closure of the embryonic fissure and can be complicated by choroidal neovascularization and retinal detachment. Other abnormalities that will be discussed are congenital tilted disc syndrome, duplicity of the optic disc head, congenital pigmentation of the optic disc head and myelinated retinal nerve fibers. All of these abnormalities can be associated with syndromes and neurological diseases, as well as other potentially blinding ophthalmological defects which can be secondarily complicated by amblyopia, strabismus and nystagmus. Thus, they should be recognized in order to plan for appropriate follow-up.
- Published
- 2019
46. Spontaneous Reversal of Peripheral Nonperfusion in Sickle Cell Retinopathy
- Author
-
Aude Couturier, Wilfried Minvielle, and Prithvi Ramtohul
- Subjects
medicine.medical_specialty ,Adolescent ,business.industry ,Fundus Oculi ,Anemia, Sickle Cell ,Retina ,Peripheral ,Ophthalmology ,Retinal Diseases ,Medicine ,Humans ,Sickle cell retinopathy ,Fluorescein Angiography ,business - Published
- 2021
47. Unveiling the Junctional Zone of Atrophic Age-Related Macular Degeneration Using Retromode Imaging
- Author
-
Prithvi Ramtohul, Ismael Chehaibou, and Ramin Tadayoni
- Subjects
Aged, 80 and over ,Ophthalmoscopy ,Ophthalmology ,Fundus Oculi ,Geographic Atrophy ,Humans ,Female ,Fluorescein Angiography ,Retina - Published
- 2021
48. Multimodal Imaging of Acute Siderotic Maculopathy
- Author
-
Pierre Gascon, Danièle Denis, Prithvi Ramtohul, and Alban Comet
- Subjects
Multimodal imaging ,Adult ,Male ,medicine.medical_specialty ,Siderosis ,business.industry ,Fundus Oculi ,General Medicine ,medicine.disease ,Multimodal Imaging ,Ophthalmology ,Macular Degeneration ,Acute Disease ,medicine ,Maculopathy ,Humans ,Macula Lutea ,Fluorescein Angiography ,business ,Tomography, Optical Coherence - Published
- 2020
49. Covid-19-Associated Retinopathy: A Case Report
- Author
-
Emmanuelle Bertrand, Pierre Gascon, Alban Comet, L Swiader, Jean Marc Durand, Marie Beylerian, Antoine Briantais, Danièle Denis, Prithvi Ramtohul, and Lauren Sauvan
- Subjects
Male ,medicine.medical_specialty ,Visual acuity ,genetic structures ,Coronavirus disease 2019 (COVID-19) ,Fundus Oculi ,Pneumonia, Viral ,Visual Acuity ,Ophthalmoscopy ,03 medical and health sciences ,Betacoronavirus ,0302 clinical medicine ,Retinal Diseases ,Ophthalmology ,Medicine ,Immunology and Allergy ,Humans ,Macula Lutea ,Fluorescein Angiography ,Dyschromatopsia ,Pandemics ,030203 arthritis & rheumatology ,medicine.diagnostic_test ,business.industry ,SARS-CoV-2 ,Blind spot ,COVID-19 ,Middle Aged ,medicine.disease ,Fluorescein angiography ,eye diseases ,Left eye ,Acute Disease ,030221 ophthalmology & optometry ,sense organs ,medicine.symptom ,business ,Coronavirus Infections ,Tomography, Optical Coherence ,Retinopathy - Abstract
A 53-year-old man presented with acute loss of vision, negative scotoma and dyschromatopsia in his left eye. He reported contact with people with severe respiratory syndrome - coronavirus-2 (SARS-CoV-2) 8 days prior symptoms. Funduscopic examination revealed several retinal hemorrhages. Spectral-domain optical coherence tomography showed lesions consistent with acute macular neuroretinopathy and paracentral acute middle maculopathy. Quickly after his presentation, SARSCov-2 was confirmed by chest computed tomography-scan and RT-PCR in this patient. Thrombotic complications associated with Covid-19 infection have high incidence and may involve the retina. We described a case of retinal involvement associated with Covid-19 infection.Funduscopic examination revealed retinal hemorrhages in a man with loss of vision. Optical coherence tomography showed an acute macular neuroretinopathy and paracentral acute middle maculopathy. Coronavirus disease was confirmed by chest computed tomography-scan and RT-PCR.
- Published
- 2020
50. Pseudovitelliform Maculopathy Associated with FGFR Inhibitor Therapy
- Author
-
Alban Comet, Prithvi Ramtohul, and Danièle Denis
- Subjects
Aged, 80 and over ,Male ,medicine.medical_specialty ,Urologic Neoplasms ,business.industry ,Fundus Oculi ,medicine.disease ,Ophthalmology ,Macular Degeneration ,Fibroblast growth factor receptor ,Quinoxalines ,medicine ,Maculopathy ,Humans ,Pyrazoles ,Macula Lutea ,Fluorescein Angiography ,business ,Tomography, Optical Coherence - Published
- 2020
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