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      • Record: found
      • Abstract: found
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      Bilateral Pigmented Paravenous Chorioretinal Atrophy: A Case Report

      case-report

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          Abstract

          Purpose: To describe a case of bilateral pigmented paravenous chorioretinal atrophy. Methods: Observational case report. Results: A 50-year-old female patient complained of right eye pain and decreased near visual acuity. She had a best-corrected visual acuity of 20/20 in both eyes. In the posterior segment, there were atrophic changes along retinal vessels, and bony spicule pigmentation was observed in a paravenous distribution. There were some abnormal changes in the electroretinogram and electrooculogram in both eyes. Conclusions: A diagnosis of bilateral pigmented paravenous chorioretinal atrophy was made.

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          Pigmented paravenous chorioretinal atrophy is associated with a mutation within the crumbs homolog 1 (CRB1) gene.

          David Simpson, Giuliana Silvestri, Jamie G. McKay … (2004)
          Pigmented paravenous chorioretinal atrophy (PPCRA) is an unusual retinal degeneration characterized by accumulation of pigmentation along retinal veins. The purpose of this study was to describe the phenotype of a family with PPCRA, determine the mode of inheritance, and identify the causal mutation. Ophthalmic examination was performed on seven family members and serially detailed in the proband over a 3-year period. Blood samples were collected and DNA extracted. All 12 coding exons and the 5' promoter region of the crumbs homologue 1 (CRB1) gene were PCR amplified and DNA sequenced. In silico homology modeling was performed on the mutated protein domain. Subtle symmetrical chorioretinal atrophy in the inferior quadrant was the earliest clinical sign detectable within this family. Paravenous pigmentation occurred initially in the far periphery, progressing centrally, with atrophy later becoming more widespread, involving the nasal, then the temporal, and finally the upper quadrant. A novel, dominant Val162Met mutation within the fourth EGF-like domain of CRB1 cosegregates with the PPCRA phenotype. It is thought to affect domain structure, because codon 162 is involved in hydrogen bonding between the antiparallel beta-strands of the major beta-sheet, causing sufficient perturbation of the backbone that the domain-stabilizing hydrogen bond does not form or is weakened. PPCRA was dominantly inherited in this family, but exhibited variable expressivity. Males are more likely to exhibit a severe phenotype, whereas females may remain virtually asymptomatic even in later years. The PPCRA phenotype is associated with a Val162Met mutation in CRB1 which is likely to affect the structure of the CRB1 protein.
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            Pigmented paravenous retinochoroidal atrophy: a literature review supported by a unique case and insight.

            G Kirkby, Shauna Murray (2000)
            Pigmented paravenous retinochoroidal atrophy (PPRCA) is a rare disorder of unknown origin characterised by bone corpuscle pigmentation accumulation along the distribution of the retinal veins. In addition there are peripapillary pigmentary changes as well as areas of chorioretinal atrophy adjacent to the perivenular pigmentary changes. The finding of PPRCA is usually incidental and does not affect vision. The literature regarding this condition is reviewed. Its natural course has been considered controversial. Observation of the initial insult leading to PPRCA has not previously been reported. A case that provides a photographic record over 20 years of the development of this condition from the initial insult, including the gradual development of the characteristic fundus appearance, is described. The initial presentation was with a sudden reduction of vision and gross diffuse macular oedema in one eye, which was rapidly followed by similar involvement of the fellow eye despite treatment. Thus it was possible to examine the patient at the stage of the initial insult, 5 years before the development of the typical and pathognomonic retinal changes of PPRCA. The clinical and electrophysiological findings are discussed, as also is the relevance of this case to the literature reviewed.
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              Hereditary pigmented paravenous chorioretinal atrophy.

              K Noble (1989)
              Three male siblings, born of nonconsanguineous parents, manifested the characteristic paravenous bone spicule accumulation typically seen in pigmented paravenous chorioretinal atrophy. The wide range of fundus appearances was apparent. The electroretinogram confirmed a localized dystrophy, and an abnormal electro-oculogram in the least affected brother suggested a more widespread abnormality. The onset of the disorder in all three brothers was early in life (possibly congenital), and there was minimal, if any, progression. The mode of inheritance could not be established. Because some mildly affected individuals will be asymptomatic and have minimal fundus abnormalities, it is important to examine all family members when considering the diagnosis of pigmented paravenous chorioretinal atrophy.
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                Author and article information

                Journal
                Journal ID (publisher-id): COP
                Journal ID (pmc): COP
                Journal ID (doi): 10.1159/issn.1663-2699
                Title: Case Reports in Ophthalmology
                Publisher: S. Karger AG
                ISSN (Electronic): 1663-2699
                Publication date Subscription-year: 2011
                Publication date Collection: May – August 2011
                Publication date (Electronic): 07 July 2011
                Volume: 2
                Issue: 2
                Pages: 228-231
                Affiliations
                Clínica David, Unidad Oftalmológica, and Ophthalmology Department, General Hospital ‘Dr. Miguel Silva’, SSA, Morelia, Mexico
                Author notes
                *Dr. Sergio E. Hernández-Da Mota, Clínica David, Unidad Oftalmológica, Blvd. García de León 598, Nueva Chapultepec, Morelia, Michoacán 58280 (México), Tel. +52 443 314 4362, E-Mail tolodamota@yahoo.com.mx
                Article
                Publisher ID: 330552 Pmcid ID: PMC3150970 Other ID: Case Rep Ophthalmol 2011;2:228–231
                DOI: 10.1159/000330552
                PMC ID: PMC3150970
                PubMed ID: 21829406
                SO-VID: d9d9a224-7c53-4feb-9481-f0a6da2a1d9c
                Copyright © © 2011 S. Karger AG, Basel
                License:

                Open Access License: This is an Open Access article licensed under the terms of the Creative Commons Attribution-NonCommercial 3.0 Unported license (CC BY-NC) ( http://www.karger.com/OA-license), applicable to the online version of the article only. Distribution permitted for non-commercial purposes only. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                Page count
                Figures: 2, Pages: 4
                Categories
                Subject: Published: July 2011

                ScienceOpen disciplines: Vision sciences,Ophthalmology & Optometry,Pathology
                Keywords: Chorioretinal atrophy,Atrophy,Paravenous atrophy
                Data availability:
                ScienceOpen disciplines: Vision sciences, Ophthalmology & Optometry, Pathology
                Keywords: Chorioretinal atrophy, Atrophy, Paravenous atrophy

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