raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:171433

Intermediate nemaline myopathy

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Autosomal recessive
Age of onset
Neonatal
Status
active

Intermediate nemaline myopathy is a type of nemaline myopathy (NM) that shows features of typical NM in neonates with a more severe progression.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enIntermediate nemaline myopathy
frMyopathie némaline intermédiaire
deNemalin-Myopathie, intermediäre
esMiopatía nemalínica intermedia
itMiopatia nemalinica di grado intermedio
nlIntermediaire nemaline myopathie
ptMiopatia nemalínica intermédia
plŚredniozaawansowana miopatia nemalinowa
csStředně těžká nemalinová myopatie
ukПомірно виражена немалінова міопатія
zh中间型杆状体肌病
trOrta nemalin miyopati

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM161800BTNTvalidated
OMIM256030BTNTvalidated
OMIM609284BTNTvalidated
OMIM615731BTNTvalidated
ICD-10G71.2NTBTattributedvalidated
ICD-118C72.00NTBTindexvalidated
MONDO0015736Evalidated
UMLSC5680452Evalidated
GARD12823Evalidated

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 (5):

No children.

4

Genes

4 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
KLHL41Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:16905ENSG000002394746077012q31.1kelch like family member 4124268659[PMID]
ACTA1Disease-causing germline mutation(s) inAssessedHGNC:129ENSG000001436321026101q42.13actin alpha 1, skeletal muscle
NEBDisease-causing germline mutation(s) inAssessedHGNC:7720ENSG000001830911616502q23.3nebulin
TPM3Disease-causing germline mutation(s) inAssessedHGNC:12012ENSG000001435491910301q21.3tropomyosin 318382475[PMID]
5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—EuropeClass onlyNot yet validatedORPHANET

Value is Orphadata's ValMoy: the mean estimate per 100 000 for prevalence and incidence, the number of cases or families for case reports.

6

HPO phenotypes

29 annotations · validated 2018-07-16
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003324Generalized muscle weakness
HP:0003798Nemaline bodies
HP:0006829Severe muscular hypotonia
Frequent (79-30%)
HP:0000765Abnormal thorax morphology
HP:0001558Decreased fetal movement
HP:0002015Dysphagia
HP:0003458EMG: myopathic abnormalities
HP:0010628Facial palsy
HP:0001371Flexion contracture
HP:0001288Gait disturbance
HP:0002375Hypokinesia
HP:0001265Hyporeflexia
HP:0001270Motor delay
HP:0005855Multiple prenatal fractures
HP:0002058Myopathic facies
HP:0001561Polyhydramnios
HP:0002878Respiratory failure
HP:0003202Skeletal muscle atrophy
HP:0003803Type 1 muscle fiber predominance
Occasional (29-5%)
HP:0001284Areflexia
HP:0001349Facial diplegia
HP:0002705High, narrow palate
HP:0000316Hypertelorism
HP:0000343Long philtrum
HP:0000369Low-set ears
HP:0000602Ophthalmoplegia
HP:0001622Premature birth
Very rare (<4-1%)
HP:0002804Arthrogryposis multiplex congenita
Excluded (0%)
HP:0001638Cardiomyopathy

Run the differential on the 3 obligate / very frequent terms

Annotation source: 22431881[PMID]_24268659[PMID]_20554445[PMID]_25205138[PMID]_11333380[PMID]

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Sources for this card