Abstract
Purpose
Mutations in the RS1 gene are known to cause retinoschisis, an X-linked hereditary retinal degeneration. Here, we present a case of atypical retinoschisis with clinical findings of retinoschisis and retinitis pigmentosa.
Methods
This report is an observational case report. The detailed ophthalmological examinations included visual field determination, multimodal imaging and electrophysiological recordings. Targeted next-generation sequencing of a retinal disease gene panel was performed.
Results
The 55-year-old male, highly hyperopic patient, presented with a best-corrected Snellen visual acuity of 20/100 in the right eye and 20/400 in the left eye. In the kinetic visual field, there was a superior scotoma, as well as a ring scotoma in the inferior hemisphere in the right eye and a concentric visual field constriction to 10° in the left eye. Funduscopy revealed marked pigmentary changes (i.e. bone spicules) in the mid-periphery bilaterally and symmetrically, as well as two small intra-retinal haemorrhages in the left eye. Full-field electroretinography recordings showed extinguished rod and cone responses. Diagnostic–genetic testing revealed a hemizygous missense mutation in the RS1 gene (c.305G > A; p.Arg102Gln) was identified.
Conclusion
We present a case of atypical retinoschisis with clinical findings of retinitis pigmentosa.
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Acknowledgements
We would like to thank Prof. Paul Sieving for his helpful comments on this case.
Funding
The study was supported by Grants from the German Research Council (DFG Excellence Center EXC307) to EZ, and from the Tistou and Charlotte Kerstan Foundation to FN and AK.
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Nasser, F., Kohl, S., Kuehlewein, L. et al. A case of X-linked retinoschisis with atypical fundus appearance. Doc Ophthalmol 139, 75–81 (2019). https://doi.org/10.1007/s10633-019-09698-3
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DOI: https://doi.org/10.1007/s10633-019-09698-3