raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:476406

Congenital generalized hypercontractile muscle stiffness syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Not applicable
Age of onset
Antenatal, Neonatal
Status
active

A rare defect of tropomyosin characterized by decreased fetal movements and generalized muscle stiffness at birth. Additional features include joint contractures, short stature, kyphosis, dysmorphic features, temperature dysregulation, and variably severe respiratory involvement with hypoxemia. Muscle biopsy shows mild myopathic features.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enCongenital generalized hypercontractile muscle stiffness syndrome
frSyndrome congénital de rigidité musculaire hypercontractile généralisée
deSyndrom der kongenitalen generalisierten hyperkontraktilen Muskelsteifheit
esSíndrome de rigidez muscular hipercontractil congénito generalizado
itSindrome congenita da rigidità muscolare generalizzata ipercontrattile
nlCongenitale gegeneraliseerde hypercontractiele spierstijfheid-syndroom
ptSíndrome de rigidez muscular hipercontráctil generalizada congénita
plWrodzony uogólniony zespół sztywności mięśniowej z hiperkurczliwością
csKongenitální generalizovaný syndrom hyperkontraktilní svalové ztuhlosti
ukВроджений генералізований синдром гіперскоротливої ригідності мязів
zh遗传性全身过度收缩性肌肉僵硬综合征
trDoğumsal jeneralize hiper kasılma kas sertliği sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10G71.2NTBTattributedvalidated
MONDO0018780Evalidated
UMLSC5567789Evalidated

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 (4):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
TPM3Disease-causing germline mutation(s) (gain of function) inAssessedHGNC:12012ENSG000001435491910301q21.3tropomyosin 326418456[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated26418456[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26418456[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