raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:3166

Sialuria

Synonyms: Sialuria, French type

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

A rare disorder of sialic acid metabolism characterized by excretion of large quantities of free sialic acid (predominantly N-acetylneuraminic acid without any morphologic evidence of storage within any subcellular organelle), mildly coarse facial features and hepatosplenomegaly. Growth and development are rather normal, however some affected individuals were reported to have moderate developmental delay, slight motor delay and mild intellectual impairment. Additional clinical features may involve macrocephaly, mild small airway obstruction, frequent upper respiratory tract infections, transient failure to thrive, seizures and sleep apnea. Signs and symptoms can be transient, especially in infancy.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSialuriaSialuria, French type
frSialurieSialurie type francais
deSialurieSialurie, französischer Typ
esSialuriaSialuria tipo francés
itSialuriaSialuria, tipo francese
nlSialurieSialurie, Frans type
ptSialúriaSialúria tipo francês
plSialuriaSialuria, typ francuski
csSialurieSialurie, francouzský typ
ukСіалуріяСіалурія, французький тип
zh唾液酸尿症唾液酸尿症,法国型
trSiyalüriSialuria, Fransız tipi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM269921Evalidated
ICD-10E77.8NTBTattributedvalidated
ICD-115C56.4NTBTindexvalidated
MONDO0010028Evalidated
UMLSC0342853Evalidated
GARD4865Evalidated

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
GNEDisease-causing germline mutation(s) inAssessedHGNC:23657ENSG000001599216038249p13.3glucosamine (UDP-N-acetyl)-2-epimerase/N-acetylmannosamine kinase20301343[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families5 casesWorldwideCase(s)Validated11486897[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_11486897[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

36 annotations · validated 2017-03-23
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:00046912-3 toe syndactyly
HP:0001999Abnormal facial shape
HP:0001939Abnormality of metabolism/homeostasis
HP:0012103Abnormality of the mitochondrion
HP:0007018Attention deficit hyperactivity disorder
HP:0001081Cholelithiasis
HP:0000280Coarse facial features
HP:0000943Dysostosis multiplex
HP:0002910Elevated circulating hepatic transaminase concentration
HP:0000286Epicanthus
HP:0002574Episodic abdominal pain
HP:0002474Expressive language delay
HP:0001290Generalized hypotonia
HP:0002240Hepatomegaly
HP:0001433Hepatosplenomegaly
HP:0002705High, narrow palate
HP:0001609Hoarse voice
HP:0002487Hyperkinetic movements
HP:0000316Hypertelorism
HP:0001256Intellectual disability, mild
HP:0001382Joint hypermobility
HP:0001847Long hallux
HP:0000369Low-set ears
HP:0002354Memory impairment
HP:0000629Periorbital fullness
HP:0003645Prolonged partial thromboplastin time
HP:0008151Prolonged prothrombin time
HP:0011220Prominent forehead
HP:0001250Seizure
HP:0010535Sleep apnea
HP:0000319Smooth philtrum
HP:0008443Spinal deformities
HP:0000219Thin upper lip vermilion
HP:0002781Upper airway obstruction
HP:0000431Wide nasal bridge
Occasional (29-5%)
HP:0001263Global developmental delay

Run the differential on the 12 obligate / very frequent terms

Annotation source: 11486897[PMID]

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Sources for this card