raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:98827

Unclassified myelodysplastic syndrome

Type
Disease
Group
Disorder
Inheritance
Not applicable
Age of onset
All ages
Status
active

Unclassified myelodysplastic syndrome (MDS-U) is a subtype of myelodysplastic syndrome (MDS) with atypical features of uncertain clinical significance.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enUnclassified myelodysplastic syndrome
frSyndrome myélodysplasique non-classifié
deMyelodysplastisches Syndrom, nicht-klassifizierbares
esSíndrome mielodisplásico no clasificado
itSindrome mielodisplastica non classificata
nlNiet-geclassificeerd myelodysplastisch syndroom
ptSíndrome mielodisplásico, não classificado
plNiesklasyfikowany zespół mielodysplastyczny
csNeklasifikovaný myelodysplastický syndrom
ukНекласифікований мієлодиспластичний синдром
zh未分类骨髓增生异常综合征
trSınıflandırılmamış miyelodisplastik sendrom

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10D46.7NTBTattributedvalidated
ICD-112A37Especificvalidated
MONDO0020315Evalidated
UMLSC5681636Evalidated

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
Annual incidenceUnknown—WorldwideClass onlyValidatedWHO Tumour classification[OTHER]
Point prevalenceUnknown—WorldwideClass onlyValidatedWHO Tumour classification[OTHER]

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

10 annotations · validated 2019-06-11
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002863Myelodysplasia
Frequent (79-30%)
HP:0045040Abnormal lactate dehydrogenase activity
HP:0001871Abnormality of blood and blood-forming tissues
HP:0012378Fatigue
HP:0012148Multiple lineage myelodysplasia
Occasional (29-5%)
HP:0002960Autoimmunity
HP:0005528Bone marrow hypocellularity
HP:0001974Increased total leukocyte count
HP:0030166Night sweats
Very rare (<4-1%)
HP:0004808Acute myeloid leukemia

Run the differential on the 1 obligate / very frequent terms

Annotation source: 26799610[PMID]_28297619[PMID]_27039723[PMID]_17709138[PMID]_30091023[PMID]_30555034[PMID]

7

Sources for this card