scholarly journals A multimodal study and management of retinitis punctata albescens

2020 ◽  
Vol 64 (2) ◽  
pp. 213-216
Author(s):  
Glenda Espinosa-Barberi ◽  
José Francisco Galván González ◽  
David Viera Peláez
Keyword(s):  
Retinitis Punctata Albescens

A PRPH2 gene variant detected in retinitis punctata albescens with congenital hypertrophy of the retinal pigment epithelium

2020 ◽  
pp. 112067212096202
Author(s):  
Aowang Qiu ◽  
Yan Yu ◽  
Junlong Huang ◽  
Qinghuai Liu ◽  
Yannis M Paulus ◽  
...  
Keyword(s):  
Retinal Pigment Epithelium ◽  
Pigment Epithelium ◽  
Retinal Pigment ◽  
Cone Photoreceptor ◽  
Blurred Vision ◽  
Full Field ◽  
Photoreceptor Outer Segments ◽  
Pigmented Lesions ◽  
Retinitis Punctata Albescens ◽  
Congenital Hypertrophy

Retinitis punctata albescens (RPA) is generally diagnosed by the presence of numerous clusters of white punctate lesions in the retina that progress over time and are related to several gene variants. The multifocal variant of congenital hypertrophy of the retinal pigment epithelium (CHRPE) is characterized by multiple, grouped, sharply circumscribed, pigmented spots. The PRPH2 gene encodes a photoreceptor-specific glycoprotein, which is essential for the morphogenesis of rod and cone photoreceptor outer segments. A 39-year-old Chinese female with nyctalopia, complained about blurred vision, presented a unique co-existing feature of RPA and CHRPE. Dilated fundus exam demonstrated numerous porcelain white discrete dots in both eyes and multiple, small, flat clusters of round brown to black pigmented lesions in the left eye. The full field electroretinography (ERG) showed decreased responses after standard dark adaptation and normal b-wave amplitudes after a long (4-h) dark-adapted period. A heterozygous PRPH2 splicing variant was detected in the proband. In addition, the same variant was found in her mother, her son, and her daughter. We describe a PRPH2 variant in a rare case of RPA associated with multifocal CHRPE of the same individual.

A novel homozygous frameshift variant in the cellular retinaldehyde-binding protein 1 (RLBP1) gene causes retinitis punctata albescens

2020 ◽  
pp. 112067212091906
Author(s):  
Sónia Torres-Costa ◽  
Carla Sofia Ferreira ◽  
Ana Grangeia ◽  
Renato Santos-Silva ◽  
Elisete Brandão ◽  
...  
Keyword(s):  
Autosomal Recessive ◽  
Anterior Segment ◽  
Functional Studies ◽  
Pathogenic Variants ◽  
Ocular Symptoms ◽  
Retinitis Punctata Albescens ◽  
Rod System ◽  
Causal Variants ◽  
Recessive Transmission ◽  
Caucasian Female

Background Retinitis punctata albescens is a form of retinitis pigmentosa characterized by white fleck-like deposits in the fundus, in most cases caused by pathogenic variants in RLBP1 gene. The purpose of this work is to report the phenotypic and genotypic data of a patient with retinitis punctata albescens carrying a deletion in the RLBP1 gene. Results An 8-year-old Caucasian female has been complaining of nyctalopia for the last 2 years. No other ocular symptoms were present. No relevant past medical or familiar history was described. At clinical examination, the patient’s best-corrected visual acuity was 20/20 in both eyes. Anterior segment evaluation and intraocular pressure were normal in both eyes. At fundoscopy, multiple punctate whitish-yellow fleck-like lesions were observed in the proximity of temporal superior and inferior vascular arcades. Scotopic electroretinogram demonstrated severely reduced rod response, without improvement or recovery of rod system function after prolonged dark adaptation. Blood DNA samples of this patient and from her parents were screened for causal variants in RLBP1, RDH5, and PRPH2. Conclusion A probable pathogenic frameshift variant was identified in homozygosity in the RLBP1 gene with an autosomal recessive transmission as another cause of retinitis punctata albescens. This DNA variant will aid ongoing functional studies and add to our understanding of the molecular pathology about RLBP1-associated retinopathies.

Novel Mutation in RLBP1 Gene in a Japanese Patient With Retinitis Punctata Albescens

2005 ◽  
Vol 139 (6) ◽  
pp. 1133-1135 ◽  
Author(s):  
Makoto Nakamura ◽  
Jian Lin ◽  
Yasuki Ito ◽  
Yozo Miyake
Keyword(s):  
Japanese Patient ◽  
Novel Mutation ◽  
Retinitis Punctata Albescens

RETINITIS PUNCTATA ALBESCENS

1930 ◽  
Vol 3 (6) ◽  
pp. 755-757
Author(s):  
L. F. APPLEMAN
Keyword(s):  
Retinitis Punctata Albescens

scholarly journals Genetic testing for retinitis punctata albescens/fundus albipunctatus

2017 ◽  
Vol 1 (s1) ◽  
pp. 96-98
Author(s):  
Andi Abeshi ◽  
Pamela Coppola ◽  
Tommaso Beccari ◽  
Munis Dundar ◽  
Fabiana D’Esposito ◽  
...  
Keyword(s):  
Genetic Testing ◽  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Autosomal Recessive Inheritance ◽  
Field Testing ◽  
Clinical Findings ◽  
Ophthalmological Examination ◽  
Visual Field Testing ◽  
Fundus Albipunctatus ◽  
Retinitis Punctata Albescens

Abstract We studied the scientific literature and disease guidelines in order to summarize the clinical utility of genetic testing for retinitis punctata albescens/fundus albipunctatus (RPA/FA). RPA and FA are reported to have autosomal dominant or autosomal recessive inheritance and are associated with variations in the PRPH2, RHO, RLBP1 and RDH5 genes. There is insufficient data to establish their prevalence. Clinical diagnosis is based on clinical findings, ophthalmological examination, optical coherence tomography, visual field testing and undetectable or severely reduced electroretinogram amplitudes. The genetic test is useful for confirming diagnosis, and for differential diagnosis, couple risk assessment and access to clinical trials.

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