raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:239

Dyggve-Melchior-Clausen disease

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

A rare, genetic primary bone dysplasia of the spondylo-epi-metaphyseal dysplasia (SEMD) group characterized by progressive short-trunked dwarfism, protruding sternum, microcephaly, intellectual disability and pathognomonic radiological findings (generalized platyspondyly with double-humped end plates, irregularly ossified femoral heads, a hypoplastic odontoid, and a lace-like appearance of iliac crests)

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enDyggve-Melchior-Clausen disease
frSyndrome de Dyggve-Melchior-Clausen
deDyggve-Melchior-Clausen-Syndrom
esSíndrome de Dyggve-Melchior-Clausen
itMalattia di Dyggve-Melchior-Clausen
nlZiekte van Dyggve-Melchior-Clausen
ptDoença de Dyggve-Melchior-Clausen
plChoroba Dyggve, Melchiora i Clausena
csDyggveho-Melchiorova-Clausenova chorobaDyggve-Melchior-Clausenova choroba
ukХвороба Дигве-Мельхіора-Клаузена
zhDyggve-Melchior-Clausen综合征
trDyggve-Melchior-Clausen hastalığı

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM223800Evalidated
OMIM304950BTNTvalidated
ICD-10Q77.7NTBTattributedvalidated
ICD-11LD24.3NTBTindexvalidated
MONDO0009130Evalidated
MeSHC535726Evalidated
UMLSC0265286Evalidated
GARD6295Evalidated

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 (3):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
DYMDisease-causing germline mutation(s) (loss of function) inAssessedHGNC:21317ENSG0000014162760746118q21.1dymeclin21280149[PMID]_12554689[PMID]_18996921[PMID]_12491225[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families100 casesWorldwideCase(s)Validated[EXPERT]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_[EXPERT]

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

59 annotations · validated 2021-06-18
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003521Disproportionate short-trunk short stature
HP:0001508Failure to thrive
HP:0001249Intellectual disability
HP:0002651Spondyloepimetaphyseal dysplasia
Frequent (79-30%)
HP:0040163Abnormal pelvis bone morphology
HP:0003368Abnormality of the femoral head
HP:0003272Abnormality of the hip bone
HP:0000925Abnormality of the vertebral column
HP:0005106Abnormality of the vertebral endplates
HP:0004568Beaking of vertebral bodies
HP:0006429Broad femoral neck
HP:0000885Broad ribs
HP:0000280Coarse facial features
HP:0002656Epiphyseal dysplasia
HP:0001288Gait disturbance
HP:0031233Horizontal inferior border of scapula
HP:0003090Hypoplasia of the capital femoral epiphysis
HP:0003274Hypoplastic acetabulae
HP:0000946Hypoplastic ilia
HP:0008786Iliac crest serration
HP:0010864Intellectual disability, severe
HP:0003690Limb muscle weakness
HP:0100255Metaphyseal dysplasia
HP:0000252Microcephaly
HP:0001270Motor delay
HP:0000768Pectus carinatum
HP:0000926Platyspondyly
HP:0008905Rhizomelia
HP:0003510Severe short stature
HP:0003026Short long bone
HP:0000470Short neck
HP:0010306Short thorax
HP:0002652Skeletal dysplasia
HP:0003183Wide pubic symphysis
Occasional (29-5%)
HP:0003028Abnormality of the ankles
HP:0003467Atlantoaxial instability
HP:0004242Broad carpal bones
HP:0002812Coxa vara
HP:0000750Delayed speech and language development
HP:0003698Difficulty standing
HP:0031987Diminished ability to concentrate
HP:0002359Frequent falls
HP:0002857Genu valgum
HP:0006633Glenoid fossa hypoplasia
HP:0000752Hyperactivity
HP:0001347Hyperreflexia
HP:0003311Hypoplasia of the odontoid process
HP:0002540Inability to walk
HP:0001256Intellectual disability, mild
HP:0001377Limited elbow extension
HP:0003066Limited knee extension
HP:0002465Poor speech
HP:0001538Protuberant abdomen
HP:0002788Recurrent upper respiratory tract infections
HP:0002747Respiratory insufficiency due to muscle weakness
HP:0001285Spastic tetraparesis
Excluded (0%)
HP:0012379Abnormal enzyme/coenzyme activity
HP:0007957Corneal opacity
HP:0000365Hearing impairment

Run the differential on the 4 obligate / very frequent terms

Annotation source: 33216345[PMID]_32766185[PMID]

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Sources for this card