raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:33445

Neuroectodermal melanolysosomal disease

Synonyms: Elejalde neuroectodermal melanolysosomal disease

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Childhood
Status
active

A rare genetic neurological disease characterized by silvery hair, profound dysfunction of central nervous system, abnormal melanocytes and melanosomes and abnormal inclusion bodies in fibroblast and other cells.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enNeuroectodermal melanolysosomal diseaseElejalde neuroectodermal melanolysosomal disease
frMaladie neuroectodermique mélanolysosomaleMaladie neuroectodermique mélanolysosomale d'Elejalde
deNeuroektodermale melanolysosomale KrankheitElejalde-Krankheit
esEnfermedad neuroectodérmica melanolisosomalEnfermedad neuroectodérmica melanolisosomal de Elejalde
itMalattia neuroectodermica melanolisosomialeMalattia neuroectodermica melanolisosomiale di Elejalde
nlNeuro-ectodermale melanolysosomale ziekteNeuro-ectodermale melanolysosomale ziekte van Elejalde
ptDoença melanolisossomal neuroectodérmicaDoença melano-lisossomal neuroectodérmica Elejalde
plNeuroektodermalna choroba melanolizosomalnaChoroba Elejalde
csNeuroektodermální melanolysosomální onemocněníElejaldova choroba
ukНейроектодермальна меланолізосомальна хворобаНейроектодермальна меланолізосомальна хвороба Елейнда
zh神经外胚层黑色素溶酶体病Elejalde病
trNöroektodermal melanolizozomal hastalıkElejalde hastalığı

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM256710Evalidated
ICD-10L81.4NTBTattributedvalidated
ICD-11LD27.YNTBTindexvalidated
MONDO0009742Evalidated
MeSHC536203Evalidated
UMLSC1860157Evalidated

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 (7):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MYO5ADisease-causing germline mutation(s) inAssessedHGNC:7602ENSG0000019753516077715q21.2myosin VA
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families20 casesWorldwideCase(s)Validated474620[PMID]_10052404[PMID]_11170073[PMID]_17710870[PMID]
Point prevalence<1 / 1 000 000—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

29 annotations · validated 2017-09-18
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0100022Abnormality of movement
HP:0001263Global developmental delay
HP:0005599Hypopigmentation of hair
HP:0001010Hypopigmentation of the skin
HP:0001252Hypotonia
HP:0001249Intellectual disability
HP:0002216Premature graying of hair
HP:0001250Seizure
HP:0001328Specific learning disability
Frequent (79-30%)
HP:0000545Myopia
HP:0001337Tremor
Occasional (29-5%)
HP:0000587Abnormal optic nerve morphology
HP:0002334Abnormality of the cerebellar vermis
HP:0008059Aplasia/Hypoplasia of the macula
HP:0001251Ataxia
HP:0001321Cerebellar hypoplasia
HP:0002120Cerebral cortical atrophy
HP:0100308Cerebral cortical hemiatrophy
HP:0007440Generalized hyperpigmentation
HP:0001276Hypertonia
HP:0007754Macular dystrophy
HP:0003552Muscle stiffness
HP:0000639Nystagmus
HP:0000648Optic atrophy
HP:0002205Recurrent respiratory infections
HP:0002063Rigidity
HP:0001257Spasticity
HP:0000486Strabismus
HP:0012157Subcortical cerebral atrophy

Run the differential on the 9 obligate / very frequent terms

7

Sources for this card