raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:577

Mucolipidosis type III

Synonyms: Pseudo-Hurler polydystrophy

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

A rare lysosomal disease characterized by dysmorphic features and skeletal changes, restricted joint mobility, short stature, and hand deformities (such as claw hands, stiffness of hands, carpal tunnel syndrome, inability to make fists). Most patients have normal intellectual capacity and the clinical progression is less rapid than that of mucolipidosis type II (MLII).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enMucolipidosis type IIIPseudo-Hurler polydystrophy
frMucolipidose type IIIPseudopolydystrophie de Hurler
deMukolipidose Typ IIIPseudo-Hurler-Polydystrophie
esMucolipidosis tipo IIIPseudopolidistrofia de Hurler
itMucolipidosi tipo IIIPolidistrofia pseudo-Hurler
nlMucolipidose type IIIPseudo-Hurler polydystrofie
ptMucolipidose tipo IIIPolidistrofia pseudo-Hurler
plMukolipidoza typu IIIPolidystrofia pseudo-Hurler
csMukolipidóza, typ IIIPseudo-Hurlerové polydystrofie
ukМуколіпідоз, тип IIIПсевдо-Гурлерівська полідистрофія
zh粘脂贮积症III型假性胡尔勒多种营养不良
trMukolipidoz tip IIIPsödo-Hurler polidistrofi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM252600BTNTvalidated
OMIM252605BTNTvalidated
ICD-10E77.0NTBTinclusionvalidated
ICD-115C56.20NTBTindexvalidated
UMLSC0033788Evalidated
GARD3806Evalidated
MedDRA10072929Evalidated

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 (2):

Children (2):

4

Genes

0 direct · 2 via subtypes

Orphanet records no gene directly on this code.

Recorded by Orphanet on subtypes of this disorder:

GeneSubtypeAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
GNPTABORPHA:423461Mucolipidosis type III alpha/betaDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:29670ENSG0000011167060784012q23.2N-acetylglucosamine-1-phosphate transferase subunits alpha and beta18425436[PMID]
GNPTGORPHA:423470Mucolipidosis type III gammaDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:23026ENSG0000009058160783816p13.3N-acetylglucosamine-1-phosphate transferase subunit gamma20034096[PMID]_19708128[PMID]
5

Prevalence and incidence

6 records
TypeClassValueAreaQualificationValidationSource
Annual incidence1-9 / 1 000 0000.985 / 100 000EuropeValue and classValidated10480370[PMID]_ 14685153[PMID]_ ORPHANET
Annual incidence<1 / 1 000 0000.08 / 100 000NetherlandsValue and classValidated10480370[PMID]
Annual incidence1-9 / 1 000 0001.68 / 100 000PortugalValue and classValidated14685153[PMID]
Point prevalence1-5 / 10 00029.55 / 100 000EuropeValue and classValidatedORPHANET
Point prevalence1-9 / 100 0002.4 / 100 000NetherlandsValue and classValidatedORPHANET
Point prevalence1-5 / 10 00050.4 / 100 000PortugalValue and classValidatedORPHANET

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

36 annotations · validated 2024-07-02
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003312Abnormal form of the vertebral bodies
HP:0003272Abnormality of the hip bone
HP:0004493Craniofacial hyperostosis
HP:0003264Deficiency of N-acetylglucosamine-1-phosphotransferase
HP:0008821Hypoplastic inferior ilia
HP:0001387Joint stiffness
HP:0008818Large iliac wings
HP:0000269Prominent occiput
HP:0004322Short stature
HP:0025261Stiff finger
HP:0000505Visual impairment
Frequent (79-30%)
HP:0030680Abnormal cardiovascular system morphology
HP:0009837Bullet-shaped distal phalanges of the hand
HP:0012532Chronic pain
HP:0034337Claw hand deformity
HP:0000280Coarse facial features
HP:0100543Cognitive impairment
HP:0012185Constrictive median neuropathy
HP:0007957Corneal opacity
HP:0000943Dysostosis multiplex
HP:0002857Genu valgum
HP:0001385Hip dysplasia
HP:0003307Hyperlordosis
HP:0001634Mitral valve prolapse
HP:0002758Osteoarthritis
HP:0000938Osteopenia
HP:0002650Scoliosis
Occasional (29-5%)
HP:0001659Aortic regurgitation
HP:0000885Broad ribs
HP:0012378Fatigue
HP:0001653Mitral regurgitation
HP:0004349Reduced bone mineral density
HP:0002091Restrictive ventilatory defect
HP:0002176Spinal cord compression
HP:0001072Thickened skin
HP:0002515Waddling gait

Run the differential on the 11 obligate / very frequent terms

Annotation source: 20301784[PMID]_29704188[PMID]_36869440[PMID]

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Sources for this card