raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:66637

Diaphanospondylodysostosis

Synonyms: DSD

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Antenatal, Infancy, Neonatal
Status
active

A rare primary bone dysplasia characterized by costovertebral ossification defects with small chest, abnormal vertebral segmentation, and posterior rib gaps containing incompletely differentiated mesenchymal tissue. Consistent dysmorphic craniofacial features include ocular hypertelorism, epicanthal folds, depressed nasal bridge with short nose, and low-set ears. The most common extraosseous manifestations are renal abnormalities such as multicystic kidneys. The disease is usually perinatally lethal due to respiratory insufficiency.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enDiaphanospondylodysostosisDSD
frDysostose diaphano-spondylaireDSD · Diaphano-spondylo-dysostose
deDiaphanospondylodysostose= en
esDiafanoespondilodisostosis
itDiafanospondilodisostosi= en
nlDiafanospondylodysostose= en
ptDiafanospodilodisostose= en
plDiafanospondylodysostoza= en
csDiafanospondylodysostóza= en
ukДіафаноспондилодизостоз= en
zh透明脊椎骨发育不全
trDiafanospondilodisostoz

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM608022Evalidated
ICD-10Q78.8NTBTattributedvalidated
ICD-11LD24.5YNTBTindexvalidated
MONDO0011946Evalidated
MeSHC564305Evalidated
UMLSC1842691Evalidated

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.

Codes that Orphanet moved or referred to this one:

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
BMPERDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:24154ENSG000001646196086997p14.3BMP binding endothelial regulator20869035[PMID]_21990102[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families18 casesWorldwideCase(s)Validated26467725[PMID]_21990102[PMID]_22581610[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26467725[PMID]_21990102[PMID]_22581610[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

11 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0005640Abnormal vertebral segmentation and fusion
HP:0004599Absent or minimally ossified vertebral bodies
HP:0100625Enlarged thorax
HP:0000921Missing ribs
HP:0005562Multiple renal cysts
HP:0002475Myelomeningocele
HP:0003275Narrow pelvis bone
HP:0002098Respiratory distress
HP:0000470Short neck
HP:0010306Short thorax
Occasional (29-5%)
HP:0000175Cleft palate

Run the differential on the 10 obligate / very frequent terms

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Sources for this card