raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:163662

Spondyloepiphyseal dysplasia, Reardon type

historical

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

A rare spondyloepiphyseal dysplasia and spondyloepimetaphyseal dysplasia characterized by short stature, vertebral abnormalities (including irregular vertebral endplates especially in the dorsal spine, lumbar lordosis, spondylolysis, spondylolisthesis), femoral abnormalities (including small femoral capital epiphyses, flat femoral head and subluxation and sloping acetabulum) and cervical spine abnormalities typically manifest as atlantoaxial subluxation and instability associated with os odontoideum. Affected individuals present with severe neurological complications following minor trauma due to cervical instability, including quadriparesis, brisk reflexes, clonus, spasticity, bulbar palsy and seizures. Additional clinical features may include mild joint laxity, short, clubbed fingers, wasting of small hand muscles, tongue fasciculations and progressive breathing difficulty. There have been no further descriptions in the literature since 1994.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enSpondyloepiphyseal dysplasia, Reardon type
frDysplasie spondylo-épiphysaire type Reardon
deDysplasie, spondyloepiphysäre, Typ Reardon
esDisplasia espondiloepifisaria tipo Reardon
itDisplasia spondiloepifisaria, tipo Reardon
nlSpondylo-epifysaire dysplasie, Reardon-type
ptDisplasia espondiloepifisária, tipo Reardon
plDysplazja kręgowo-nasadowa, typ Reardona
csSpondyloepifyzární dysplázie, Reardonův typ
ukСпондилоепіфізарна дисплазія, тип Ріардона
zhReardon 型脊柱骨骺发育不良
trSpondiloepifizyal displazi, Reardon tipi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM600561Evalidated
ICD-10Q77.7NTBTattributedvalidated
ICD-11LD24.3NTBTindexvalidated
MONDO0010902Evalidated
UMLSC4305148Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families1 familiesWorldwideFamily(ies)Validated7747755[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_7747755[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

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

7

Sources for this card