raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:53372

Hereditary geniospasm

Synonyms: Hereditary chin myoclonus · Hereditary chin-trembling · Familial trembling of the chin

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Childhood
Status
active

A rare genetic tremor disorder characterized by recurrent episodes of involuntary tremor of the chin and lower lip due to isolated myoclonus of the mentalis muscle. Patients may present more severe symptoms such as tongue biting and psychological distress. Even though neurological abnormalities are not associated, occasional involvement of sleep disorders and other facial muscles have been described. Sporadic cases were also reported.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHereditary geniospasmHereditary chin myoclonus · Hereditary chin-trembling · Familial trembling of the chin
frGéniospasme héréditaireTremblement familial du menton · Tremblement héréditaire du menton
deGeniospasmus, hereditärerFamiliäres Zittern des Kinns · Kinn-Myoklonus, hereditärer
esGeniospasmo o espasmo mandibular
itGeniospasmo
nlErfelijk geniospasmeErfelijk kinbeven · Erfelijke myoclonus van kin · Familiale tremor van kin
ptGeniospasmo hereditário
plDziedziczne drżenie mięśnia bródkowegoDziedziczne drżenie brody · Dziedziczny mioklonus brody · Rodzinne drżenie brody
csHereditární geniospasmusFamiliární třes brady · Dědičný myoklonus brady · Dědičný třes brady
ukСпадковий геніоспазмСімейне тремтіння підборіддя · Спадковий міоклонус підборіддя · Спадкове тремтіння підборіддя
zh遗传性颏痉挛遗传性颏震颤
trKalıtsal geniospazmKalıtsal çene miyoklonusu · Kalıtsal çene titremesi · Ailesel çene titremesi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM190100Evalidated
ICD-10G25.3NTBTattributedvalidated
MONDO0008588Evalidated
MeSHC537682Evalidated
UMLSC2931589Evalidated
GARD9501Evalidated

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

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (2):

No children.

4

Genes

0 direct

Orphanet records no gene directly on this code.

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Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass 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

7 annotations · validated 2021-09-07
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0012462Chin myoclonus
Very frequent (99-80%)
HP:3000007Abnormality of mentalis muscle
Occasional (29-5%)
HP:0012433Abnormal social behavior
HP:0000178Abnormality of lower lip
Excluded (0%)
HP:0002353EEG abnormality
HP:0003457EMG abnormality
HP:0002080Intention tremor

Run the differential on the 2 obligate / very frequent terms

Annotation source: 25829069[PMID]_26388646[PMID]_27117562[PMID]

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Sources for this card