raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:90117

Hereditary motor and sensory neuropathy, Okinawa type

Synonyms: HMSNP · Hereditary motor and sensory neuropathy, proximal type

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

Hereditary motor and sensory neuropathy, Okinawa type is a rare, genetic, axonal hereditary motor and sensory neuropathy characterized by the adult-onset of slowly progressive, symmetric, proximal dominant muscle weakness and atrophy, painful muscle cramps, fasciculations and distal sensory impairment, mostly (but not exclusively) in individuals (and their descendents) from the Okinawa region in Japan. Absent deep tendon reflexes, elevated creatine kinase levels and autosomal dominant inheritance are also characteristic.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enHereditary motor and sensory neuropathy, Okinawa typeHMSNP · Hereditary motor and sensory neuropathy, proximal type
frNeuropathie sensitivo-motrice héréditaire type OkinawaNeuropathie sensitivo-motrice proximale familiale
deNeuropathie, hereditäre motorisch-sensorische, Typ OkinawaHMSNP · Neuropathie, hereditäre motorisch-sensorische, proximaler Typ
esNeuropatía sensitivo-motora hereditaria, tipo OkinawaHMSNP · Neuropatía hereditaria sensitivo-motora tipo proximal
itNeuropatia sensitivo-motoria ereditaria, tipo OkinawaHMSNP · Neuropatia sensitivo-motoria ereditaria, tipo prossimale
nlHereditaire motorische en sensorische neuropathie, Okinawa-typeHMSNP · Hereditaire motorische en sensorische neuropathie, proximaal type
ptNeuropatia sensitiva e motora hereditária, tipo Okinawa
plDziedziczna neuropatia ruchowa i czuciowa typu OkinawyDziedziczna neuropatia ruchowa i czuciowa, typ proksymalny · HMSNP
csHereditární motorická a senzorická neuropatie, typ OkinawaHMSNP · Dědičná motorická a senzorická neuropatie, proximální typ
ukСпадкова моторна та сенсорна нейропатія, тип ОкінаваСпадкова моторна та сенсорна нейропатія, проксимальний тип · HMSNP
zh遗传性运动感觉神经病Okinawa型遗传性运动感觉性神经病,近端型
trKalıtsal motor ve duyusal nöropati, Okinawa tipiHMSNP · Kalıtsal motor ve duyusal nöropati, proksimal tip

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM604484Evalidated
ICD-10G60.0NTBTinclusionvalidated
ICD-118C20.YNTBTindexvalidated
MONDO0011468Evalidated
MeSHC535717Evalidated
UMLSC1858338Evalidated
GARD10131Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
TFGDisease-causing germline mutation(s) inAssessedHGNC:11758ENSG000001143546024983q12.2trafficking from ER to golgi regulator22883144[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families120 casesWorldwideCase(s)Validated22883144[PMID]
Point prevalenceUnknown—WorldwideClass onlyValidatedORPHANET

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

28 annotations · validated 2021-02-10
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0030179Abnormal peripheral action potential amplitude
HP:0001284Areflexia
HP:0012735Cough
HP:0030200Fatiguable weakness of proximal limb muscles
HP:0011964Intermittent painful muscle spasms
HP:0007340Lower limb muscle weakness
HP:0003474Somatic sensory dysfunction
HP:0003484Upper limb muscle weakness
Frequent (79-30%)
HP:0031910Abnormal cranial nerve physiology
HP:0000079Abnormality of the urinary system
HP:0002483Bulbar signs
HP:0003698Difficulty standing
HP:0002936Distal sensory impairment
HP:0030007EMG: positive sharp waves
HP:0003236Elevated circulating creatine kinase concentration
HP:0002540Inability to walk
HP:0007289Limb fasciculations
HP:0010546Muscle fibrillation
HP:0001337Tremor
Occasional (29-5%)
HP:0011014Abnormal glucose homeostasis
HP:0010827Abnormality of the seventh cranial nerve
HP:0011951Aspiration pneumonia
HP:0002015Dysphagia
HP:0002094Dyspnea
HP:0410262Lower cranial nerve dysfunction
HP:0011470Nasogastric tube feeding in infancy
HP:0002878Respiratory failure
HP:0004887Respiratory failure requiring assisted ventilation

Run the differential on the 8 obligate / very frequent terms

Annotation source: 25725944[PMID]_29552439[PMID]

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Sources for this card