raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2777

Osteomesopyknosis

Synonyms: Axial osteosclerosis · Osteomesopycnosis

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

Osteomesopyknosis is a very rare benign bone disorder characterized by bone dysplasia manifested by patchy sclerosis of the axial skeleton and increased bone mineral content.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enOsteomesopyknosisAxial osteosclerosis · Osteomesopycnosis
frOstéomésopycnoseOstéosclérose axiale
deOsteomesopyknoseOsteosklerose, axiale
esOsteomesopicnosisOsteosclerosis axial
itOsteomesopicnosiOsteosclerosi assiale
nlOsteomesopycnoseAxiale osteosclerose
ptOsteomesopicnoseOsteosclerose axial
plOsteoskleroza osiowaOsteoskleroza osiowa · Osteomezopyknoza
csOsteomezopyknózaAxiální osteoskleróza
ukОстеомезопікнозАксіальний остеосклероз · Остеомезопікноз
zh中轴骨硬化轴向骨硬化
trOsteomezopiknozAksiyal osteoskleroz

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM166450Evalidated
ICD-10Q78.2NTBTattributedvalidated
ICD-11LD24.10NTBTindexvalidated
MONDO0008155Evalidated
MeSHC537792Evalidated
UMLSC0432264Evalidated
GARD391Evalidated

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/families35 casesWorldwideCase(s)Validated26185059[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_26185059[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

7 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0011001Increased bone mineral density
Frequent (79-30%)
HP:0003312Abnormal form of the vertebral bodies
HP:0002808Kyphosis
HP:0100861Sclerotic vertebral body
HP:0002650Scoliosis
Occasional (29-5%)
HP:0003103Abnormal cortical bone morphology
HP:0001939Abnormality of metabolism/homeostasis

Run the differential on the 1 obligate / very frequent terms

7

Sources for this card