Scoring Algorithm-Based Genomic Testing in Dystonia: A Prospective Validation Study

Michael Zech, Robert Jech, Sylvia Boesch, Matej Škorvánek, Ján Necpál, Jana Švantnerová, Matias Wagner, Ariane Sadr-Nabavi, Felix Distelmaier, Martin Krenn, Tereza Serranová, Irena Rektorová, Petra Havránková, Alexandra Mosejová, Iva Příhodová, Jana Šarláková, Kristína Kulcsarová, Olga Ulmanová, Karel Bechyně, Miriam OstrozovičováVladimír Haň, Joaquim Ribeiro Ventosa, Theresa Brunet, Riccardo Berutti, Mohammad Shariati, Ali Shoeibi, Susanne A. Schneider, Alice Kuster, Matthias Baumann, David Weise, Friederike Wilbert, Wibke G. Janzarik, Matthias Eckenweiler, Volker Mall, Bernhard Haslinger, Steffen Berweck, Juliane Winkelmann, Konrad Oexle

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Background: Despite the established value of genomic testing strategies, practice guidelines for their use do not exist in many indications. Objectives: We sought to validate a recently introduced scoring algorithm for dystonia, predicting the diagnostic utility of whole-exome sequencing (WES) based on individual phenotypic aspects (age-at-onset, body distribution, presenting comorbidity). Methods: We prospectively enrolled a set of 209 dystonia-affected families and obtained summary scores (0–5 points) according to the algorithm. Singleton (N = 146), duo (N = 11), and trio (N = 52) WES data were generated to identify genetic diagnoses. Results: Diagnostic yield was highest (51%) among individuals with a summary score of 5, corresponding to a manifestation of early-onset segmental or generalized dystonia with coexisting non-movement disorder-related neurological symptoms. Sensitivity and specificity at the previously suggested threshold for implementation of WES (3 points) was 96% and 52%, with area under the curve of 0.81. Conclusions: The algorithm is a useful predictive tool and could be integrated into dystonia routine diagnostic protocols.

Original languageEnglish
Pages (from-to)1959-1964
Number of pages6
JournalMovement Disorders
Volume36
Issue number8
DOIs
StatePublished - Aug 2021

Keywords

  • diagnostic yield
  • dystonia
  • exome sequencing
  • prediction
  • rare disease
  • scoring algorithm

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