raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2790

Endosteal hyperostosis, Worth type

Synonyms: Autosomal dominant osteosclerosis, Worth type · Worth syndrome

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal dominant
Age of onset
Adolescent
Status
active

A rare primary bone dysplasia characterized by increased and diffuse skeletal densification, particularly of the cranial vault and tubular long bones, that is not associated with an increased risk of fracture. Craniofacial anomalies usually develop during adolescence and include a prominent forehead, wide and deep mandibles, a flat nasal bridge, taurus palatinus and an increased gonial angle. Neurological complications are present in approximately one fifth of affected patients, usually in the form of entrapment neuropathies such as hearing loss, and are secondary to nerve tissue compression by hyperostotic bone, cerebellar disturbances due to a reduction in size of the posterior cranial fossa or tonsillar herniation, and chronic intracranial hypertension.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enEndosteal hyperostosis, Worth typeAutosomal dominant osteosclerosis, Worth type · Worth syndrome
frHyperostose endostéale type WorthOstéosclérose autosomique dominante type Worth · Syndrome de Worth
deEndostale Hyperostose, Typ WorthOsteosklerose, autosomal-dominante, Typ Worth · Worth-Syndrom
esHiperostosis endostal tipo WorthOsteosclerosis autosómica dominante tipo Worth · Síndrome de Worth
itOtosclerosi autosomica dominante, tipo WorthIperostosi endostale, tipo Worth · Sindrome di Worth
nlEndostale hyperostose, Worth-typeAutosomaal dominante osteosclerose, Worth-type · Syndroom van Worth
ptOsteosclerose autossómica dominante tipo WorthHiperostose endosteal, tipo Worth · Síndrome de Worth
plAutosomalna dominująca osteoskleroza typu WorthaHiperostoza endosteum, typu Wortha · Zespół Wortha
csAutozomálně dominantní osteoskleróza, Worthův typEndosteální hyperostóza, Worthův typ · Worthův syndrom
ukЕндостальний гіперостоз, тип ВортаАутосомно-домінантний остеосклероз, тип Ворта · Синдром Ворта
zh骨内膜骨质增生,Worth型常染色体显性遗传性骨硬化,Worth型
trEndosteal hiperostoz, Worth tipiWorth sendromu · Otozomal dominant osteoskleroz, Worth tipi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM144750Evalidated
ICD-10Q78.2NTBTattributedvalidated
ICD-11LD24.1YNTBTindexvalidated
MONDO0007764Evalidated
MeSHC536748Evalidated
UMLSC0432273Evalidated
GARD390Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
LRP5Disease-causing germline mutation(s) inAssessedHGNC:6697ENSG0000016233760350611q13.2LDL receptor related protein 512579474[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families6 familiesWorldwideFamily(ies)Validated8030669[PMID]_18031587 [PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_8030669[PMID]_18031587 [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

13 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003103Abnormal cortical bone morphology
HP:0000772Abnormal rib morphology
HP:0100923Clavicular sclerosis
HP:0004493Craniofacial hyperostosis
HP:0005019Diaphyseal thickening
HP:0005789Generalized osteosclerosis
HP:0100789Torus palatinus
Frequent (79-30%)
HP:0003312Abnormal form of the vertebral bodies
HP:0100861Sclerotic vertebral body
Occasional (29-5%)
HP:0010628Facial palsy
HP:0000303Mandibular prognathia
HP:0000639Nystagmus
HP:0000407Sensorineural hearing impairment

Run the differential on the 7 obligate / very frequent terms

7

Sources for this card