raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98893

Congenital muscular dystrophy type 1B

Synonyms: CMD1B · MDC1B

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

Congenital muscular dystrophy type 1B is a rare, genetic neuromuscular disorder characterized by proximal and symmetrical muscle weakness (particularly of neck, sternomastoid, facial and diaphragm muscles), spinal rigidity, joint contractures (Achilles tendon, elbows, hands), generalized muscle hypertrophy and early respiratory failure (usually in the first decade of life). Patients typically present delayed motor milestones and grossly elevated serum creatine kinase levels, and with disease progression, forced expiratory abdominal squeeze and nocturnal hypoventilation.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCongenital muscular dystrophy type 1BCMD1B · MDC1B
frDystrophie musculaire congénitale type 1BCMD1B · DMC1B · MDC1B
deMuskeldystrophie, kongenitale, Typ 1B= en
esDistrofia muscular congénita tipo 1B= en
itDistrofia muscolare congenita, tipo 1B= en
nlCongenitale spierdystrofie type 1B= en
ptDistrofia muscular congénita, tipo 1b
plWrodzona dystrofia mięśniowa typu 1B= en
csVrozená svalová dystrofie, typ 1B= en
ukВроджена мязова дистрофія, тип 1В= en
zh先天性肌营养不良症IB型= en
trDoğumsal kas distrofisi tip 1B= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM604801Evalidated
ICD-10G71.2NTBTattributedvalidated
ICD-118C70.6NTBTindexvalidated
MONDO0011486Evalidated
MeSHC565748Evalidated
UMLSC1858118Evalidated

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 (1):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families6 casesWorldwideCase(s)Validated10677302[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_10677302[PMID]

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

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card