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 language | English |
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Pages (from-to) | 1959-1964 |
Number of pages | 6 |
Journal | Movement Disorders |
Volume | 36 |
Issue number | 8 |
DOIs | |
State | Published - Aug 2021 |
Keywords
- diagnostic yield
- dystonia
- exome sequencing
- prediction
- rare disease
- scoring algorithm