raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:85162

Facial onset sensory and motor neuronopathy

Synonyms: FOSMN syndrome

Type
Disease
Group
Disorder
Inheritance
Unknown
Age of onset
Adult, Elderly
Status
active

Facial onset sensory and motor neuronopathy is characterised initially by paraesthesia and numbness in the region of the trigeminal nerve distribution, which later progresses to involve the scalp, neck, upper trunk and upper limbs. Onset of motor manifestations occurs later with cramps, fasciculations, dysphagia, dysarthria, muscle weakness and atrophy. This syndrome has been described in four males and appears to be a slowly progressive neurodegenerative disease.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enFacial onset sensory and motor neuronopathyFOSMN syndrome
frNeuronopathie motrice et sensorielle à début facialSyndrome FOSMN
deNeuropathie, fazial beginnende, sensorische und motorischeFOSMN-Syndrom
esNeuropatía sensitiva autonómica de inicio facialSíndrome FOSMN
itNeuropatia sensitivo-motoria a esordio faccialeSindrome FOSMN
nlSensorische en motorische neuropathie met faciale aanvangFOSMN-syndroom
ptNeuronopatia sensitiva e motora de início na face
plNeuropatia czuciowa i ruchowa rozpoczynająca się od twarzyZespół FOSMN
csSenzorická a motorická neuropatie počínající v obličejiFOSMN syndrom
ukСенсорна та моторна нейронопатія, що починається з обличчяСиндром FOSMN
zh面部首发型感觉和运动神经病FOSMN综合征
trYüz başlangıçlı duyusal ve motor nöronopatiFOSMN sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10G60.0NTBTattributedvalidated
MONDO0019405Evalidated
UMLSC4509818Evalidated
GARD12036Evalidated

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.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families47 casesWorldwideCase(s)Validated29781209[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_29781209[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.

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HPO phenotypes

7 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001260Dysarthria
HP:0002015Dysphagia
HP:0002380Fasciculations
HP:0003394Muscle spasm
HP:0001324Muscle weakness
HP:0003401Paresthesia
HP:0003202Skeletal muscle atrophy

Run the differential on the 7 obligate / very frequent terms

Annotation source: 24643461[PMID]

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Sources for this card