neurodevelopmental disorder with severe motor impairment and absent language
Findings
No curated finding names neurodevelopmental disorder with severe motor impairment and absent language yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
A complex neurodevelopmental disorder caused by variation in DHX30. Individuals with variants in DHX30 have been found to have variable presentations including intellectual disability, delayed or absent speech development, delayed motor development, hypotonia, feeding difficulties, and ataxic gait or the inability to walk. Other phenotypic features commonly reported include sleep disorders, autistic features, seizures, and joint hypermobility
Definition from the Mondo Disease Ontology (MONDO:0060622), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal dominant inheritance
- Onset and course
- Infantile onset
HPO, annotations 2026-09-02
Features
56 features
What the disease is reported to present with, and how often among people who have it — never how often a feature means the disease. HPO, annotations 2026-09-02.
- Delayed speech and language developmentHPOHP:0000750
- 12 of 12 reported patients
- HypotoniaHPOHP:0001252
- 12 of 12 reported patients
- Intellectual disabilityHPOHP:0001249
- 12 of 12 reported patients
- Motor delayHPOHP:0001270
- 12 of 12 reported patients
- Absent speechHPOHP:0001344
- 10 of 12 reported patients
- Feeding difficultiesHPOHP:0011968
Genes
1 gene
Germline variants in the gene encoding each protein, as classified by GenCC submitters, each in their own words. Limited, disputed and refuted submissions are listed too.
- DHX30HGNC:16716
- Definitive · ClinGen · Autosomal dominant · 2024
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal dominant · 2022
- Strong · G2P · Autosomal dominant · 2017
- Strong · PanelApp Australia · Autosomal dominant · 2025
Where it sits
Other names
2 names
Resolves to: neurodevelopmental disorder with severe motor impairment and absent language
- Also called
- DHX30-related complex neurodevelopmental disorderneurodevelopmental delay-intellectual disability-ataxia-feeding difficulty syndrome