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Krenn, M.* ; Tomschik, M.* ; Rath, J.* ; Cetin, H.* ; Grisold, A.* ; Zulehner, G.* ; Milenkovic, I.* ; Stogmann, E.* ; Zimprich, A.* ; Strom, T.M. ; Meitinger, T. ; Wagner, M. ; Zimprich, F.*

Genotype-guided diagnostic reassessment after exome sequencing in neuromuscular disorders: Experiences with a two-step approach.

Eur. J. Neurol. 27, 51-61 (2020)
Publ. Version/Full Text Research data DOI PMC
Open Access Gold (Paid Option)
Creative Commons Lizenzvertrag
Background and purpose Next-generation sequencing has greatly improved the diagnostic success rates for genetic neuromuscular disorders (NMDs). Nevertheless, most patients still remain undiagnosed, and there is a need to maximize the diagnostic yield. Methods A retrospective study was conducted on 72 patients with NMDs who underwent exome sequencing (ES), partly followed by genotype-guided diagnostic reassessment and secondary investigations. The diagnostic yields that would have been achieved by appropriately chosen narrow and comprehensive gene panels were also analysed. Results The initial diagnostic yield of ES was 30.6% (n = 22/72 patients). In an additional 15.3% of patients (n = 11/72) ES results were of unknown clinical significance. After genotype-guided diagnostic reassessment and complementary investigations, the yield was increased to 37.5% (n = 27/72). Compared to ES, targeted gene panels (<25 kilobases) reached a diagnostic yield of 22.2% (n = 16/72), whereas comprehensive gene panels achieved 34.7% (n = 25/72). Conclusion Exome sequencing allows the detection of pathogenic variants missed by (narrowly) targeted gene panel approaches. Diagnostic reassessment after genetic testing further enhances the diagnostic outcomes for NMDs.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Diagnostic Reassessment ; Diagnostic Yield ; Exome Sequencing ; Gene Panels ; Neuromuscular Disorders ; Next-generation Sequencing; Clinical Exome; Genetic Diagnosis; Medical Genetics; Utility
ISSN (print) / ISBN 1351-5101
e-ISSN 1468-1331
Journal European Journal of Neurology
Quellenangaben Volume: 27, Issue: 1, Pages: 51-61 Article Number: , Supplement: ,
Publisher Wiley
Publishing Place 111 River St, Hoboken 07030-5774, Nj Usa
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Human Genetics (IHG)
Grants Austrian Society of Epileptology (_OGfE)
Austrian Society of Neurology (_OGN)