raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:141148

Hemifacial myohyperplasia

Type
Malformation syndrome
Group
Disorder
Age of onset
Neonatal
Status
active

Hemifacial myohyperplasia is a rare developmental defect during embryogenesis characterized by unilateral hyperplasia of the facial musculature with no evidence of hyperplasia of bone or other organ systems. It clinically present with dimpling of the skin, ptosis, enophthalmos, narrow palpebral fissure, auricular displacement, smaller nasal vestibule, and nasal and chin deviation on the affected side. Facial paresis of the affected side and mild ipsilateral hypoplasia of the facial skeleton might be present.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHemifacial myohyperplasia
frMyohyperplasie hémifaciale
deMyohyperplasie, hemifaziale
esMiohiperplasia hemifacial
itMioiperplasia emifacciale
nlHemifaciale myohyperplasie
ptMio-hiperplasia hemifacial
plPołowiczy przerost mięśni twarzy
csHemifaciální myohyperplázie
ukГеміфаціальна міогіперплазія
zh半侧颜面肌肉增生
trHemifasiyal miyohiperplazi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM606773Evalidated
ICD-10Q67.4NTBTattributedvalidated
ICD-11LA52NTBTindexvalidated
MONDO0011723Evalidated
MeSHC535862Evalidated
UMLSC1847521Evalidated
GARD10084Evalidated

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):

  • ORPHA:156207Macroglossia
    rare developmental anomalies during embryogenesis; rare genetic diseases; rare surgical maxillo-facial diseases

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families12 casesWorldwideCase(s)Validated20583183[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_20583183[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