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| ID | Type | Description | Link |
|---|---|---|---|
| 2019-A02526-51 | Other Identifier | ID RCB |
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| Name | Class |
|---|---|
| URC-CIC Paris Descartes Necker Cochin | OTHER |
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The objective of this study is to study the function of the pigment epithelium in patients with neurofibromatosis type 1 using electro-oculogram to confirm abnormally high values reported in previous studies, but also to correlate this hyperactivity of the pigment epithelium with the presence and size of choroidal hyperreflective areas observed in infra-red imaging of the fundus.
The hypothesis of the study is that the function of the pigment epithelium measured by the electro-oculogram correlates with the surface of choroidal hyperreflective areas. Finally, the potential consequences of a supra-normal function of the pigment epithelium on the global retinal function are not known. A full-field electroretinogram will evaluate the global neurosensory retinal function.
Patients with neurofibromatosis type 1 have numerous eye problems: glioma of the optic pathways, Lisch nodules, palpebral involvement by plexiform neurofibromas, orbital dysplasia, etc. With the emergence of multimodal imaging in ophthalmology a new ocular involvement has been described: choroidal hyperreflective areas. They are located in the most superficial layers of the choroid, adjacent to the retinal pigment epithelium, visible only on infra-red imaging of the fundus. These areas are frequently observed, about 90% in adults and 70 to 80% in children. With a sensitivity of 0.83 and a specificity of 0.96, these lesions would have their place as a diagnostic criterion for neurofibromatosis type 1.
In parallel, two successive studies have evaluated the function of the retinal pigment epithelium using electro-oculograms; they showed in patients with neurofibromatosis type 1 a significant increase in the Arden ratio, reflecting hyperactivity of the pigment epithelium.
The objective of this study is to study the function of the pigment epithelium in patients with neurofibromatosis type 1, using electro-oculogram to confirm these abnormally high values, but also to correlate this hyperactivity of the pigment epithelium to the presence and total area of choroidal lesions observed in infra-red imaging of the fundus.
The hypothesis of the study is that the function of the pigment epithelium measured by the electro-oculogram correlates with the surface of the choroidal hyperreflective areas. Finally, the potential consequences of a supra-normal function of the pigment epithelium on the global retinal function are not known. A full-field electroretinogram will evaluate the global neurosensory retinal function.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Infrared hyperreflective area | Patients with neurofibromatosis type 1 and with infrared hyperreflective areas |
| |
| No infrared hyperreflective areas | Patients with neurofibromatosis type 1 and with no infrared hyperreflective areas |
| |
| Controls | Patients with no neurofibromatosis type 1 |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Electro-oculogram | Other | Electrophysiological recording of changes in electrical potential across the retinal pigmentary epithelium during successive periods of dark and light adaptation, according to ISCEV standards. Results will comprise dark trough value and light/dark (Arden) ratio. |
| Measure | Description | Time Frame |
|---|---|---|
| Dark trough value | Electro-oculogram : dark trough value (μV). | 12 months |
| Light/dark (Arden) ratio | Electro-oculogram : ratio between the light and dark potentials. | 12 months |
| Measure | Description | Time Frame |
|---|---|---|
| Number and area of infrared hyperreflective areas | Infrared fundus picture. | 12 months |
| Values of the amplitudes | Electroretinogram : values of the amplitudes (μV) of a- and/or b-waves for dark-adapted 0.01, dark adapted 3.0, dark-adapted 10.0, dark-adapted 3.0 oscillatory potentials, light-adapted 3.0, and light-adapted 3.0 flicker. |
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Inclusion Criteria:
Patients with neurofibromatosis type 1, aged 7 years or older:
Control patients free from retinal or choroidal pathology, matched for age to patients in the group with neurofibromatosis type 1.
Patients consulting the ophthalmology department of Necker-Enfants Malades Hospital.
Non-opposition of the holders of the parental authority and the minor patient; non-opposition of the major patient.
Exclusion Criteria:
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Patients consulting the ophthalmology department of Necker-Enfants Malades Hospital:
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| Name | Affiliation | Role |
|---|---|---|
| Matthieu Robert, MD, PhD | Assistance Publique - Hôpitaux de Paris | Principal Investigator |
| Dominique Brémond-Gignac, MD, PhD | Assistance Publique - Hôpitaux de Paris | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Hôpital Necker-Enfants Malades | Paris | 75015 | France |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 11720259 | Background | Lubinski W, Zajaczek S, Sych Z, Penkala K, Palacz O, Lubinski J. Electro-oculogram in patients with neurofibromatosis type 1. Doc Ophthalmol. 2001 Sep;103(2):91-103. doi: 10.1023/a:1012271206258. | |
| 21963267 | Background | Viola F, Villani E, Natacci F, Selicorni A, Melloni G, Vezzola D, Barteselli G, Mapelli C, Pirondini C, Ratiglia R. Choroidal abnormalities detected by near-infrared reflectance imaging as a new diagnostic criterion for neurofibromatosis 1. Ophthalmology. 2012 Feb;119(2):369-75. doi: 10.1016/j.ophtha.2011.07.046. Epub 2011 Oct 2. |
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| ID | Term |
|---|---|
| D009456 | Neurofibromatosis 1 |
| ID | Term |
|---|---|
| D017253 | Neurofibromatoses |
| D009455 | Neurofibroma |
| D018317 | Nerve Sheath Neoplasms |
| D009380 | Neoplasms, Nerve Tissue |
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| Full-field electroretinogram | Other | Electrophysiological recording of retinal function. Results will comprise amplitudes and latencies of each electroretinography response (dark-adapted 0.01, dark-adapted 3.0, dark-adapted 10.0, dark-adapted 3.0 oscillatory potentials, light-adapted 3.0, light-adapted 3.0 flicker). |
|
| 12 months |
| Values of the peak times | Electroretinogram : values of the peak times (ms) of a- and/or b-waves for dark-adapted 0.01, dark adapted 3.0, dark-adapted 10.0, dark-adapted 3.0 oscillatory potentials, light-adapted 3.0, and value of the peak-to-peak time (ms) for light-adapted 3.0 flicker. | 12 months |
| 35394491 | Result | Touze R, Abitbol MM, Bremond-Gignac D, Robert MP. Function of the Retinal Pigment Epithelium in Patients With Neurofibromatosis Type 1. Invest Ophthalmol Vis Sci. 2022 Apr 1;63(4):6. doi: 10.1167/iovs.63.4.6. |
| D009370 |
| Neoplasms by Histologic Type |
| D009369 | Neoplasms |
| D009386 | Neoplastic Syndromes, Hereditary |
| D020752 | Neurocutaneous Syndromes |
| D009422 | Nervous System Diseases |
| D020271 | Heredodegenerative Disorders, Nervous System |
| D019636 | Neurodegenerative Diseases |
| D010523 | Peripheral Nervous System Diseases |
| D009468 | Neuromuscular Diseases |
| D030342 | Genetic Diseases, Inborn |
| D009358 | Congenital, Hereditary, and Neonatal Diseases and Abnormalities |