raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99970

Dedifferentiated liposarcoma

Synonyms: DDLS

Type
Histopathological subtype
Group
Subtype of disorder
Inheritance
Not applicable
Age of onset
Adult
Status
active

Dedifferentiated liposarcoma (DDLS) is a high-grade subtype of liposarcoma (LS) that progresses from well-differentiated liposarcoma (WDLS), and most often occurs in the retroperitoneum. It is defined as a region of nonlipogenic sarcoma associated with WDLS. .

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enDedifferentiated liposarcomaDDLS
frLiposarcome dédifférencié= en
deLiposarkom, dedifferenziertes= en
esLiposarcoma desdiferenciado= en
itLiposarcoma dedifferenziato= en
nlGededifferentieerd liposarcoom= en
ptLipossarcoma com perda de diferenciação
plTłuszczakomięsak odróżnicowany= en
csDediferencovaný liposarkom= en
ukДедиференційована ліпсаркома= en
zh去分化脂肪肉瘤= en
trDediferansiye liposarkom= en

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10C49.9NTBTindexvalidated
MONDO0020563Evalidated
UMLSC0205824Evalidated
MedDRA10073135Evalidated

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

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
CDK4Role in the phenotype ofAssessedHGNC:1773ENSG0000013544612382912q14.1cyclin dependent kinase 4
HMGA2Role in the phenotype ofAssessedHGNC:5009ENSG0000014994860069812q14.3high mobility group AT-hook 2
MDM2Role in the phenotype ofAssessedHGNC:6973ENSG0000013567916478512q15MDM2 proto-oncogene
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Annual incidence1-9 / 1 000 0000.27 / 100 000EuropeValue and classValidated22517534[PMID]_[EXPERT]
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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