raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98913

Postsynaptic congenital myasthenic syndrome

Type
Etiological subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

This disease is described under Congenital myasthenic syndrome

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enPostsynaptic congenital myasthenic syndrome
frSyndrome myasthénique congénital post-synaptique
dePostsynaptisches kongenitales myasthenes Syndrom
esSíndrome miasténico congénito postsináptico
itSindrome miastenica congenita postsinaptica
nlPostsynaptisch congenitaal myastheen syndroom
ptSíndromes miasténicos, congénitos, pós-sinápticos
plWrodzone postsynaptyczne zespoły miasteniczne
csPostsynaptické vrozené myastenické syndromy
ukПостсинаптичні вроджені міастенічні синдроми
zh突触后性先天性肌无力综合征
trPostsinaptik doğumsal miyastenik sendromlar
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM254300BTNTvalidated
OMIM601462BTNTvalidated
OMIM605809BTNTvalidated
OMIM608930BTNTvalidated
OMIM608931BTNTvalidated
OMIM614198BTNTvalidated
OMIM615120BTNTvalidated
OMIM616304BTNTvalidated
OMIM616313BTNTvalidated
OMIM616314BTNTvalidated
OMIM616321BTNTvalidated
OMIM616322BTNTvalidated
OMIM616323BTNTvalidated
OMIM616324BTNTvalidated
OMIM616325BTNTvalidated
OMIM616326BTNTvalidated
ICD-10G70.2NTBTattributedvalidated
ICD-118C61NTBTindexvalidated
MONDO0020344Evalidated
UMLSC0751883Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

3

Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

Children (6):

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

37 annotations · validated 2018-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Frequent (79-30%)
HP:0000496Abnormality of eye movement
HP:0410011Abnormality of masticatory muscle
HP:0001446Abnormality of the musculature of the upper limbs
HP:0003402Decreased miniature endplate potentials
HP:0003443Decreased size of nerve terminals
HP:0003403EMG: decremental response of compound muscle action potential to repetitive nerve stimulation
HP:0003458EMG: myopathic abnormalities
HP:0003388Easy fatigability
HP:0010628Facial palsy
HP:0030199Fatigable weakness of neck muscles
HP:0000218High palate
HP:0001324Muscle weakness
HP:0003722Neck flexor weakness
HP:0000597Ophthalmoparesis
HP:0000508Ptosis
HP:0001315Reduced tendon reflexes
HP:0003547Shoulder girdle muscle weakness
HP:0003202Skeletal muscle atrophy
HP:0003803Type 1 muscle fiber predominance
HP:0003484Upper limb muscle weakness
HP:0009005Weakness of the intrinsic hand muscles
Occasional (29-5%)
HP:0031374Ankle weakness
HP:0000961Cyanosis
HP:0002194Delayed gross motor development
HP:0000651Diplopia
HP:0002329Drowsiness
HP:0002875Exertional dyspnea
HP:0030196Fatigable weakness of respiratory muscles
HP:0012515Hip flexor weakness
HP:0012764Orthopnea
HP:0002792Reduced vital capacity
HP:0002878Respiratory failure
HP:0002091Restrictive ventilatory defect
HP:0002650Scoliosis
HP:0005659Thoracic kyphoscoliosis
HP:0031108Triceps weakness
HP:0009077Weakness of long finger extensor muscles

Annotation source: 6287911[PMID]

7

Sources for this card