raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:370015

Spondyloepimetaphyseal dysplasia, Isidor-Toutain type

Synonyms: SEMDIST · Spondyloepimetaphyseal dysplasia with severe short stature

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

A rare primary bone dysplasia disorder characterized by normal birth length with early postnatal growth deficiency resulting in severe disproportionate short stature (with short trunk and limbs), severe genu varum, flexion contractures in the hips and lumbar hyperlordosis. Radiological findings reveal platyspondyly with central indentation of vertebral endplates, progressive and severe epimetaphyseal abnormalities that primarily affect the lower limbs and include very small, irregular proximal femoral and knee epiphyses, severe coxa vara, delayed ossification of proximal femoral epiphyses, and irregular distal femoral and proximal tibial metaphyses.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpondyloepimetaphyseal dysplasia, Isidor-Toutain typeSEMDIST · Spondyloepimetaphyseal dysplasia with severe short stature
frDysplasie spondylo-épimétaphysaire type Isidor-ToutainSyndrome de dysplasie spondylo-épimétaphysaire-petite taille sévère
deDysplasie, spondyloepimetaphysäre, Typ Isidor-ToutainSEMDIST · Spondyloepimetaphysäre Dysplasie mit starkem Kleinwuchs
esDisplasia espondiloepimetafisaria tipo Isidor-ToutainDisplasia espondiloepimetafisaria con talla baja extrema · SEMDIST
itDisplasia spondiloepimetafisaria, tipo Isidor-ToutainDisplasia spondiloepimetafisaria con statura notevolmente bassa · SEMDIST
nlSpondylo-epimetafysaire dysplasie, Isidor-Toutain-typeSEMDIST · Spondylo-epimetafysaire dysplasie met ernstige kleine gestalte
ptDisplasia espondilometafisária, tipo IsidorDisplasia espondiloepimetafisária com baixa estatura grave
plDysplazja kręgowo-nasadowo-przynasadowa typu Isidora= en
csSpondyloepimetafyzární dysplázie, typ Isidor= en
ukСпондилоепіметафізарна дисплазія, тип Ісидора-ТутенаSEMDIST · Спондилоепіметафізарна дисплазія з вираженою низькорослістю
zhIsidor型脊柱-上肢-干骺端发育不良
trSpondiloepimetafizyal displazi, Isidor tipi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM618728Evalidated
ICD-10Q77.7NTBTattributedvalidated
ICD-11LD24.3NTBTattributedvalidated
MONDO0018254Evalidated
UMLSC5231478Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (1):

No children.

Codes that Orphanet moved or referred to this one:

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Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
RPL13Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:10303ENSG0000016752611370316q24.3ribosomal protein L1331630789[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families2 casesWorldwideCase(s)Validated23956136[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.

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HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

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Sources for this card