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| Name | Class |
|---|---|
| Universitair Ziekenhuis Brussel | OTHER |
| Erasme University Hospital | OTHER |
| University Ghent | OTHER |
| Universiteit Antwerpen |
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Whole-exome (WES) or whole-genome sequencing (WGS) are recommended as first- or second-tier molecular tests for patients with developmental disorders (DD), but the clinical utility of WGS continues to be debated. This prospective randomized trial involving all Belgian Human Genetics centers compares the standard of care (SoC) - combining WES and microarray or shallow WGS - with WGS for 567 individuals with unexplained DD. The aim of the project is to pave the way towards diagnostic implementation of WGS for rare DD in Belgium. To reach this aim, (1) technical validation is performed at different genetic centres in Belgium, (2) clinical utility of WGS is explored and (3) the health economic impact is mapped.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Standard of Care including Whole Exome Sequencing | Active Comparator | Standard of care consisting of a combination of a chromosomal microarray or shallow whole genome sequencing (standard of care copy number variant analysis in the concerned genetic center) with whole exome sequencing. |
|
| Whole Genome Sequencing | Experimental | Whole genome sequencing (primary analysis using a similar pipeline as the one used for whole exome sequencing - re-analysis using Emedgene to detect potential repeat expansions, structural and/or intronic variants) |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Whole exome sequencing | Diagnostic Test | Whole exome sequencing using Illumina short read sequencing |
|
| Measure | Description | Time Frame |
|---|---|---|
| Whole genome sequencing (WGS) performance compared to Whole exome sequencing (WES) performance | The primary outcome measure is to determine whether whole genome sequencing is able to improve the diagnostic yield of next-generation sequencing for developmental disorders. | From enrollment to reporting the results of the analysis : target turn around time of 6 months |
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Inclusion Criteria:
Exclusion Criteria:
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| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| KU Leuven | Leuven | Belgium |
The raw sequencing data generated during this study will be shared on the European Genome-phenome Archive (EGA).
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| ID | Term |
|---|---|
| D008607 | Intellectual Disability |
| D000013 | Congenital Abnormalities |
| D002658 | Developmental Disabilities |
| D035583 | Rare Diseases |
| ID | Term |
|---|---|
| D019954 | Neurobehavioral Manifestations |
| D009461 | Neurologic Manifestations |
| D009422 | Nervous System Diseases |
| D012816 | Signs and Symptoms |
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| ID | Term |
|---|---|
| D059472 | Exome |
| ID | Term |
|---|---|
| D016678 | Genome |
| D040342 | Genetic Structures |
| D055614 | Genetic Phenomena |
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| OTHER |
| Université de Liège | OTHER |
| Cliniques universitaires Saint-Luc- Université Catholique de Louvain | OTHER |
| Institut de Pathologie et de Génétique Charleroi | OTHER |
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| Whole genome Sequencing | Diagnostic Test | Whole genome sequencing using Illumina short read sequencing |
|
| D013568 | Pathological Conditions, Signs and Symptoms |
| D065886 | Neurodevelopmental Disorders |
| D001523 | Mental Disorders |
| D009358 | Congenital, Hereditary, and Neonatal Diseases and Abnormalities |
| D020969 | Disease Attributes |
| D010335 | Pathologic Processes |