scholarly journals Follow-up study of detachment of the retinal pigment epithelium.

1980 ◽  
Vol 64 (6) ◽  
pp. 412-416 ◽  
Author(s):  
M L Klein ◽  
H Obertynski ◽  
A Patz ◽  
S L Fine ◽  
M Kini
Keyword(s):  
Retinal Pigment Epithelium ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Follow Up Study

scholarly journals iPSC-Derived Retinal Pigment Epithelium Allografts Do Not Elicit Detrimental Effects in Rats: A Follow-Up Study

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Peter D. Westenskow ◽  
Felicitas Bucher ◽  
Stephen Bravo ◽  
Toshihide Kurihara ◽  
Daniel Feitelberg ◽  
...  
Keyword(s):  
Retinal Pigment Epithelium ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Age Related Macular Degeneration ◽  
Subretinal Space ◽  
Rpe Cells ◽  
Follow Up Study ◽  
Age Related ◽  
Photoreceptor Neurons

Phototransduction is accomplished in the retina by photoreceptor neurons and retinal pigment epithelium (RPE) cells. Photoreceptors rely heavily on the RPE, and death or dysfunction of RPE is characteristic of age-related macular degeneration (AMD), a very common neurodegenerative disease for which no cure exists. RPE replacement is a promising therapeutic intervention for AMD, and large numbers of RPE cells can be generated from pluripotent stem cells. However, questions persist regarding iPSC-derived RPE (iPS-RPE) viability, immunogenicity, and tumorigenesis potential. We showed previously that iPS-RPE prevent photoreceptor atrophy in dystrophic rats up until 24 weeks after implantation. In this follow-up study, we longitudinally monitored thesame implanted iPS-RPE, in the same animals. We observed no gross abnormalities in the eyes, livers, spleens, brains, and blood in aging rats with iPSC-RPE grafts. iPS-RPE cells that integrated into the subretinal space outlived the photoreceptors and survived for as long as 2 1/2 years while nonintegrating RPE cells were ingested by host macrophages. Both populations could be distinguished using immunohistochemistry and electron microscopy. iPSC-RPE could be isolated from the grafts and maintained in culture; these cells also phagocytosed isolated photoreceptor outer segments. We conclude that iPS-RPE grafts remain viable and do not induce any obvious associated pathological changes.

scholarly journals Combined Hamartoma of the Retina and Retinal Pigment Epithelium in a Patient with Gorlin Syndrome: Spontaneous Partial Resolution of Traction Caused by Epiretinal Membrane

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
José L. Sánchez-Vicente ◽  
Miguel Contreras-Díaz ◽  
Trinidad Rueda ◽  
Enrique Rodríguez de la Rúa-Franch ◽  
Fredy E. Molina-Socola ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Retinal Pigment Epithelium ◽  
Epiretinal Membrane ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Spontaneous Resolution ◽  
Fundus Examination ◽  
Gorlin Syndrome ◽  
Clinical Context

Purpose. To describe the case of spontaneous resolution of epiretinal membrane in a patient with Combined Hamartoma of the Retina and Retinal Pigment Epithelium (CHR-RPE), in the clinical context of Gorlin Syndrome (GS).Methods. Observational case report of a 12-year-old female patient is presented. The diagnosis of CHRRPE was made by OCT and fundus examination, which showed a mound of disorganized tissue originating from retina and retinal pigment epithelium. Epiretinal membrane (EM) was also detected. Genetic study was performed to confirm the diagnosis of GS.Results. The patient was observed for 39 months, showing spontaneous resolution of the traction caused by the EM and improvement in visual acuity (VA), which was 20/80 at initial presentation, rising to 20/40 after follow-up period.Conclusions. The presence of EM in CHR-REP is a cause of reduction of visual acuity. Management of this condition is controversial; however, we would like to highlight that spontaneous resolution of the traction caused by EM is possible, resulting in recovery of VA.

Acquired retinoschisis and vitreous hemorrhage as unusual findings in choroideremia: Case report

2020 ◽  
pp. 112067212094657
Author(s):  
Dario Pasquale Mucciolo ◽  
Vittoria Murro ◽  
Dario Giorgio ◽  
Andrea Sodi ◽  
Ilaria Passerini ◽  
...  
Keyword(s):  
Case Report ◽  
Retinal Pigment Epithelium ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Vitreous Hemorrhage ◽  
Advanced Stage ◽  
Vascular Abnormalities ◽  
Diagnostic Difficulties ◽  
The Right

Purpose: To report a case of choroideremia characterized by peripheral retinoschisis with vascular abnormalities and vitreous hemorrhage. Observations: A 58-year-old man affected by advanced-stage choroideremia was diagnosed with peripheral retinoschisis in both eyes. Vitreous hemorrhage was present in the right eye with a peculiar clot-like lesion at the periphery. At the 1-year follow-up, the vitreous hemorrhage had reabsorbed and the vascular clot-like lesion in the periphery had almost completely disappeared. Conclusion and importance: We have reported fundoscopic and OCT features of peripheral-acquired retinoschisis with vascular abnormalities in a patient with choroideremia. OCT examination is extremely useful in clinical evaluation of the peripheral retinal alterations in these cases, where the absence of the retinal pigment epithelium and the choriocapillaris pose many diagnostic difficulties.

Sjögren Reticular Dystrophy of the Retinal Pigment Epithelium: A Case Report

2003 ◽  
Vol 13 (5) ◽  
pp. 491-495
Author(s):  
M. Rinaldi ◽  
A. Villani ◽  
M. Borrelli ◽  
S. Russo ◽  
L. Cotticelli
Keyword(s):  
Case Report ◽  
Retinal Pigment Epithelium ◽  
Late Onset ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Clinical Manifestations ◽  
Computerized Perimetry ◽  
Fundus Photographs ◽  
First Time

Purpose To describe the clinical manifestations in a patient with Sjögren reticular dystrophy of the retinal pigment epithelium, and the evolution of the disease over a 20-year follow-up period. Case Report A 45-year-old woman with Sjögren reticular dystrophy of the retinal pigment epithelium was seen for the first time in 1983; the patient underwent 20 years of annual check-ups. Results Over the follow-up period, fundus photographs, computerized perimetry, electroretinogram, and electro-oculogram findings had either normal or slightly subnormal outcome. Conclusions The results confirm that this disease involves only the retinal pigment epithelium and should not be considered a central tapeto-retinal degeneration or late onset retinopathy.

scholarly journals Retinal Pigment Epithelium Adenoma and Adenocarcinoma: A Review

2020 ◽  
pp. 1-12
Author(s):  
Janani  Sreenivasan ◽  
Pukhraj Rishi ◽  
Kalpita Das ◽  
Subramanian Krishnakumar ◽  
Jyotirmay Biswas
Keyword(s):  
Retinal Pigment Epithelium ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Metastatic Potential ◽  
Local Resection ◽  
Imaging Features ◽  
Invasive Potential ◽  
Management Options ◽  
Rule Out

Adenoma and adenocarcinoma of the retinal pigment epithelium (RPE) are rare intraocular tumours that are often misdiagnosed as posterior uveal melanoma or other simulating lesions. It is important to be able to differentiate these tumours from melanoma for 3 reasons. First, an inability to rule out melanoma often tilts the management towards enucleation. Second, management options like radiotherapy and local resection which work well for melanoma may not be easily applied to these tumours. Third, and most importantly, patients with melanoma need a lifetime follow-up to rule out metastases (metastatic dormancy) whereas RPE tumours hardly metastasize. An abruptly elevated, often deeply pigmented tumour, with a prominent retinal feeding artery and a draining vein causing exudation, should raise a suspicion of RPE tumours. RPE tumours have a remarkable local invasive potential but a low metastatic potential. Most RPE tumours require treatment due to local complications. Small, asymptomatic tumours can be generally observed. Enucleation is still the gold standard of treatment, although local resection has been reported in selected cases with good results. Here, we provide a comprehensive review of the demographic, clinical, and imaging features of true acquired neoplasms of the RPE, namely adenoma and adenocarcinoma, the ways to differentiate them from melanoma, their clinical course and prognosis, and Options for their management.

Retinal pigment epithelium aperture in acute central serous chorioretinopathy: Another novel possible pathological mechanism

2021 ◽  
pp. 112067212110024
Author(s):  
Chunyan Lei ◽  
Rui Hua ◽  
Jianan Duan ◽  
Meixia Zhang
Keyword(s):  
Retinal Pigment Epithelium ◽  
Central Serous Chorioretinopathy ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Subretinal Fluid ◽  
Near Infrared Reflectance ◽  
Pathological Mechanism ◽  
Acute Central Serous Chorioretinopathy ◽  
Sd Oct

Purpose: To present retinal pigment epithelium (RPE) aperture related to an avascular pigment epithelium detachment (PED) secondary to acute central serous chorioretinopathy (CSC). Methods: Case report. Results: A 47-year-old man diagnosed as acute CSC presented with RPE aperture in the superonasal area of the macula in his left eye during follow-up. At 2-week follow-up, his decimal best-corrected visual acuity (BCVA) was improved from 0.08 to 0.6 and subretinal fluid was partially absorbed. However, the near-infrared reflectance demonstrated a round mild hyperreflective lesion on the superonasal area of the macula. On spectral-domain optical coherence tomography (SD-OCT), RPE band of the round lesion discontinued but RPE fractured edges without shrinkage and curling. Fundus autofluorescence (FAF) showed RPE aperture appeared as round hypoautofluorescence and hyperautofluorescence outlined its borderline. OCT angiography demonstrated that no evidence of neovascularization within the sub-RPE space. En Face OCT confirmed that the RPE aperture developed at the edge of the PED lesion. At 8-month follow-up, his decimal BCVA was improved to 1.0 and SD-OCT demonstrated spontaneous resolution of subretinal fluid and restoration of RPE structure, with complete flattening of PED. However, FAF revealed hypoautofluorescence mingled with slight hyperautofluorescence within the lesion. Conclusions: To the best of our knowledge, this is the first report of an RPE aperture secondary to acute CSC. Our case indicated another novel possible pathological mechanism that in the relatively healthy RPE, increased hydrostatic pressure simply itself could contribute to RPE aperture.

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