neurodevelopmental disorder with behavioral abnormalities, absent speech, and hypotonia
MONDO:0032878Mondo
Findings
No curated finding names neurodevelopmental disorder with behavioral abnormalities, absent speech, and hypotonia yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
- Inheritance
- Autosomal recessive inheritance
HPO, annotations 2026-09-02
Features
28 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
- 15 of 15 reported patients
- Global developmental delayHPOHP:0001263
- 16 of 16 reported patients
- Motor delayHPOHP:0001270
- 16 of 16 reported patients · Infantile onset
- Developmental regressionHPOHP:0002376
- 14 of 16 reported patients
- Floppy infantHPOHP:0008947
- 14 of 16 reported patients
- Autistic behaviorHPOHP:0000729
- 13 of 15 reported patients
- Paroxysmal bursts of laughterHPOHP:0000749
- 13 of 15 reported patients
- Inability to walkHPOHP:0002540
- 12 of 15 reported patients
- Absent speechHPOHP:0001344
- 11 of 16 reported patients
- EEG abnormalityHPOHP:0002353
- 6 of 10 reported patients
- Muscle weaknessHPOHP:0001324
- 9 of 16 reported patients
- Brain atrophyHPOHP:0012444
- 4 of 8 reported patients
Show the remaining 16
- BruxismHPOHP:0003763
- 7 of 15 reported patients
- HyperactivityHPOHP:0000752
- 7 of 16 reported patients
- Self-injurious behaviorHPOHP:0100716
- 7 of 16 reported patients
- SpasticityHPOHP:0001257
- 6 of 16 reported patients
- MicrocephalyHPOHP:0000252
- 5 of 14 reported patients
- SeizureHPOHP:0001250
- 5 of 16 reported patients
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.
- NTNG2HGNC:14288
- Definitive · G2P · Autosomal recessive · 2019
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2020
- Strong · PanelApp Australia · Autosomal recessive · 2025
- Moderate · Ambry Genetics · Autosomal recessive · 2019