raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:61

Alpha-mannosidosis

Synonyms: Lysosomal alpha-D-mannosidase deficiency

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

An inherited lysosomal storage disorder characterized by immune deficiency, facial and skeletal abnormalities, hearing impairment, and intellectual deficit.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAlpha-mannosidosisLysosomal alpha-D-mannosidase deficiency
frAlpha-mannosidoseDéficit en alpha-D-mannosidase lysosomale
deAlpha-MannosidoseAlpha-D Mannosidase-Mangel, lyosomaler
esAlfa-manosidosisDeficiencia de alfa-D-manosidasa lisosomal
itAlfa-mannosidosiDeficit di alfa-D-mannosidosi lisosomiale
nlAlfa-mannosidoseLysosomale alfa-D-mannosidasedeficiëntie
ptAlfa-manosidoseDeficiência de alfa-D-manosidase lisossomal
plAlfa-mannozydozaNiedobór lizosomalnej alfa-D mannozydazy
csAlfa-mannosidózaDeficit lysosomální alfa-D-mannosidázy
ukАльфа-маннозидозДефіцит лізосомальної альфа-D-манозидази
zhα-甘露糖苷贮积症溶酶体α-D-甘露糖苷酶缺乏症
trAlfa-mannosidozLizozomal alfa-D-mannosidaz eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM248500Evalidated
ICD-10E77.1NTBTinclusionvalidated
ICD-115C56.21NTBTindexvalidated
MONDO0009561Evalidated
MeSHD008363Evalidated
UMLSC0024748Evalidated
GARD6968Evalidated
MedDRA10083855Evalidated

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 (5):

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
MAN2B1ORPHA:309282Alpha-mannosidosis, infantile formDisease-causing germline mutation(s) inAssessedHGNC:6826ENSG0000010477460945819p13.13mannosidase alpha class 2B member 119958498[PMID]
MAN2B1ORPHA:309288Alpha-mannosidosis, adult formDisease-causing germline mutation(s) inAssessedHGNC:6826ENSG0000010477460945819p13.13mannosidase alpha class 2B member 119958498[PMID]
5

Prevalence and incidence

7 records
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 1 000 0000.1 / 100 000EuropeValue and classValidatedEuropean Medicines Agency 2005[OTHER]
Prevalence at birth<1 / 1 000 0000.09 / 100 000AustraliaValue and classValidated9918480[PMID]
Prevalence at birth1-9 / 1 000 0000.13 / 100 000NorwayValue and classNot yet validated7900112[PMID]
Prevalence at birth<1 / 1 000 0000.09 / 100 000NetherlandsValue and classValidated10480370[PMID]
Prevalence at birth1-9 / 1 000 0000.12 / 100 000PortugalValue and classValidated14685153[PMID]
Prevalence at birth1-9 / 1 000 0000.38 / 100 000Czech RepublicValue and classValidated20490927[PMID]
Prevalence at birth<1 / 1 000 0000.07 / 100 000SwedenValue and classValidated25274184[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.

6

HPO phenotypes

43 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000518Cataract
HP:0000280Coarse facial features
HP:0007957Corneal opacity
HP:0004493Craniofacial hyperostosis
HP:0002750Delayed skeletal maturation
HP:0005280Depressed nasal bridge
HP:0001263Global developmental delay
HP:0000365Hearing impairment
HP:0002240Hepatomegaly
HP:0008821Hypoplastic inferior ilia
HP:0001249Intellectual disability
HP:0000158Macroglossia
HP:0002652Skeletal dysplasia
HP:0001744Splenomegaly
HP:0005978Type II diabetes mellitus
Frequent (79-30%)
HP:0011039Abnormal helix morphology
HP:0000708Atypical behavior
HP:0006487Bowing of the long bones
HP:0000389Chronic otitis media
HP:0011354Generalized abnormality of skin
HP:0000212Gingival overgrowth
HP:0001385Hip dysplasia
HP:0000316Hypertelorism
HP:0001252Hypotonia
HP:0000023Inguinal hernia
HP:0002808Kyphosis
HP:0000400Macrotia
HP:0000189Narrow palate
HP:0010807Open bite
HP:0000336Prominent supraorbital ridges
HP:0002650Scoliosis
HP:0000470Short neck
Occasional (29-5%)
HP:0001369Arthritis
HP:0010885Avascular necrosis
HP:0000689Dental malocclusion
HP:0000738Hallucinations
HP:0002516Increased intracranial pressure
HP:0000256Macrocephaly
HP:0000303Mandibular prognathia
HP:0011369Mongolian blue spot
HP:0002205Recurrent respiratory infections
HP:0100240Synostosis of joints
HP:0000687Widely spaced teeth

Run the differential on the 12 obligate / very frequent terms

Annotation source: 23760316[PMID]_12873889[PMID]

7

Sources for this card