congenital myasthenic syndrome 12
Findings
No curated finding names congenital myasthenic syndrome 12 yet. Everything below is reference data from Mondo, HPO and GenCC, not evidence about what affects it.
Definition
Any congenital myasthenic syndromes with glycosylation defect in which the cause of the disease is a mutation in the GFPT1 gene.
Definition from the Mondo Disease Ontology (MONDO:0012518), read 2026-09-29. CC BY 4.0.
- Inheritance
- Autosomal recessive inheritance
- Onset and course
- Juvenile onset · Neonatal onset · Childhood onset
HPO, annotations 2026-09-02
Features
6 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.
- EMG: decremental response of compound muscle action potential to repetitive nerve stimulationHPOHP:0003403
- 2 of 2 reported patients
- Motor delayHPOHP:0001270
- 4 of 4 reported patients
- Proximal muscle weaknessHPOHP:0003701
- 4 of 4 reported patients
- Ragged-red muscle fibersHPOHP:0003200
- 2 of 2 reported patients
- RetinoschisisHPOHP:0030502
- 2 of 4 reported patients
- Waddling gaitHPOHP:0002515
- 2 of 4 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.
- GFPT1HGNC:4241
- Definitive · ClinGen · Autosomal recessive · 2024
- Definitive · Illumina · Autosomal recessive · 2021
- Strong · Genomics England PanelApp · Autosomal recessive · 2021
- Strong · Labcorp Genetics (formerly Invitae) · Autosomal recessive · 2022
- Strong · PanelApp Australia · Autosomal recessive · 2025
- Moderate · Ambry Genetics · Autosomal recessive · 2018
Where it sits
Other names
6 names
Resolves to: congenital myasthenic syndrome 12
- Also called
- CMS12congenital myasthenic syndrome type 12congenital myasthenic syndromes with glycosylation defect caused by mutation in GFPT1GFPT1 congenital myasthenic syndromes with glycosylation defectmyasthenia, congenital, 12, with tubular aggregatesmyasthenic syndrome, congenital, type 12