raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:93316

Spondylometaphyseal dysplasia, Schmidt type

Synonyms: Spondylometaphyseal dysplasia with severe genu valgum · Spondylometaphyseal dysplasia, Algerian type

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

Spondylometaphyseal dysplasia, Schmidt type is characterized by short stature, myopia, small pelvis, progressive kypho-scoliosis, wrist deformity, severe genu valgum, short long bones, and severe metaphyseal dysplasia with moderate spinal changes and minimal changes in the hands and feet.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpondylometaphyseal dysplasia, Schmidt typeSpondylometaphyseal dysplasia with severe genu valgum · Spondylometaphyseal dysplasia, Algerian type
frDysplasie spondylo-métaphysaire type SchmidtDysplasie spondylo-métaphysaire avec genu valgum sévère
deDysplasie, spondylometaphysäre, Typ SchmidtDysplasie, spondylometaphysäre, algerischer Typ · Dysplasie, spondylometaphysäre, mit schwerem Genu Valgum
esDisplasia espondilometafisaria tipo SchmidtDisplasia espondilometafisaria con genu valgo grave · Displasia espondilometafisaria tipo Argelia
itDisplasia spondilometafisaria, tipo SchmidtDisplasia spondilometafisaria con ginocchio valgo grave · Displasia spondilometafisaria, tipo algerino
nlSpondylometafysaire dysplasie, Schmidt-typeSpondylometafysaire dysplasie met ernstige genu valgum · Spondylometafysaire dysplasie, Algerijns type
ptDisplasia espondilometafisária, tipo Schmidt
plDysplazja kręgosłupowo-przynasadowa typu SchmidtaDysplazja kręgosłupowo-przynasadowa typu algierskiego · Dysplazja kręgosłupowo-przynasadowa z cieżką postacią kolan koślwaych
csSpondylometafyzární dysplázie, Schmidtův typSpondylometafyzární dysplázie, alžírský typ · Spondylometafyzární dysplázie s těžkým genu valgum
ukСпондилометафізарна дисплазія, тип ШмідтаСпондилометафізарна дисплазія з тяжким ступенем genu valgum · Спондилометафізарна дисплазія, алжирський тип
zh脊椎干骺端发育不良,Schmidt 型脊椎干骺端结构不良伴严重膝外翻
trSpondilometafizyal displazi, Schmidt tipiSpondilometafizyal displazi, Cezayir tipi · Ağır genu valgum ile seyreden spondilometafizyal displazi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM184253Evalidated
ICD-10Q77.8NTBTattributedvalidated
ICD-11LD24.4NTBTindexvalidated
MONDO0008478Evalidated
MeSHC535794Evalidated
UMLSC1866688Evalidated
GARD504Evalidated

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):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
COL2A1Disease-causing germline mutation(s) inAssessedHGNC:2200ENSG0000013921912014012q13.11collagen type II alpha 1 chain23653587[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families7 casesWorldwideCase(s)Validated23653587[PMID]_[EXPERT]
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

30 annotations · validated 2021-08-23
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0000944Abnormal metaphysis morphology
HP:0000925Abnormality of the vertebral column
HP:0100255Metaphyseal dysplasia
Frequent (79-30%)
HP:0010574Abnormality of the epiphysis of the femoral head
HP:0002867Abnormality of the ilium
HP:0002815Abnormality of the knee
HP:0002812Coxa vara
HP:0003521Disproportionate short-trunk short stature
HP:0002857Genu valgum
HP:0001385Hip dysplasia
HP:0003375Narrow greater sciatic notch
HP:0000926Platyspondyly
HP:0002650Scoliosis
HP:0003510Severe short stature
HP:0100866Short iliac bones
Occasional (29-5%)
HP:0003019Abnormality of the wrist
HP:0000185Cleft soft palate
HP:0002020Gastroesophageal reflux
HP:0011471Gastrostomy tube feeding in infancy
HP:0008833Irregular acetabular roof
HP:0003796Irregular iliac crest
HP:0002751Kyphoscoliosis
HP:0000347Micrognathia
HP:0000545Myopia
HP:0011470Nasogastric tube feeding in infancy
HP:0001561Polyhydramnios
HP:0002033Poor suck
HP:0100864Short femoral neck
HP:0003026Short long bone
HP:0000402Stenosis of the external auditory canal

Run the differential on the 3 obligate / very frequent terms

Annotation source: 3368247[PMID]_23653587[PMID]

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Sources for this card