raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:75564

Acquired idiopathic sideroblastic anemia

Synonyms: AISA · Primary acquired sideroblastic anemia · RARS · Refractory anemia with ringed sideroblasts

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

A rare myelodysplastic syndrome (MDS) characterized by ineffective hemopoiesis affecting one or more blood cell lineages (myeloid, erythroid or megakaryocytic) leading to peripheral blood cytopenias and an increased risk of developing leukaemia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAcquired idiopathic sideroblastic anemiaAISA · Primary acquired sideroblastic anemia · RARS · Refractory anemia with ringed sideroblasts
frAnémie sidéroblastique idiopathique acquiseAISA · ASIA · Anémie réfractaire avec sidéroblastes en couronne · Anémie sidéroblastique primaire acquise
deAnämie, sideroachrestische, erworbene idiopathischeAISA · Anämie, sideroblastische, erworbene primäre · RARS · Refraktäre Anämie mit Ringsideroblasten
esAnemia sideroblástica idiopática adquiridaAISA · ASAI · Anemia refractaria con sideroblastos en anillo · Anemia sideroblástica primaria adquirida · RARS
itAnemia sideroblastica idiopatica acquisitaAISA · Anemia refrattaria con sideroblasti ad anello · Anemia sideroblastica acquisita primitiva · RARS
nlVerworven idiopathische sideroblastische anemieAISA · Primaire verworven sideroblastische anemie · RARS · Refractaire anemie met ringsideroblasten
ptAnemia sideroblástica idiopática adquiridaAnemia refratária com sideroblastos anelares
plNabyta idiopatyczna niedokrwistość syderoblastycznaAISA · Niedokrwistość oporna na leczenie z obecnością pierścieniowatych syderoblastów · Pierwotna nabyta niedokrwistość syderoblastyczna · RARS
csZískaná idiopatická sideroblastická anémieAISA · Primární získaná sideroblastická anémie · RARS · Refrakterní anémie s prstenčitými sideroblasty
ukНабута ідіопатична сидеробластна анеміяAISA · Первинна набута сидеробластна анемія · RARS · Рефрактерна анемія з кільцевими сидеробластами
zh获得性特发性铁幼粒细胞性贫血难治性贫血伴环状铁粒幼红细胞
trEdinsel idiyopatik sideroblastik anemiAISA · RARS · Primer edinsel sideroblastik anemi · Halkalı sideroblastlar ile seyreden refrakter anemi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10D64.3NTBTattributedvalidated
ICD-112A33Especificvalidated
MONDO0019157Evalidated
MONDO19157Evalidated
UMLSC4016601Evalidated
GARD8249Evalidated

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 (2):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SF3B1Disease-causing somatic mutation(s) inAssessedHGNC:10768ENSG000001155246055902q33.1splicing factor 3b subunit 124507814[PMID]
TET2Disease-causing somatic mutation(s) inAssessedHGNC:25941ENSG000001687696128394q24tet methylcytosine dioxygenase 219557078[PMID]_19483684[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence1-9 / 100 000—EuropeClass onlyNot yet validatedORPHANET
Annual incidence<1 / 1 000 0000.09 / 100 000EuropeValue and classValidatedRARECARE surveillance of rare cancers in Europe[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

28 annotations · validated 2019-06-05
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0010972Anemia of inadequate production
HP:0004828Refractory anemia with ringed sideroblasts
Frequent (79-30%)
HP:0012132Erythroid hyperplasia
HP:0200143Megaloblastic erythroid hyperplasia
HP:0001895Normochromic anemia
HP:0001897Normocytic anemia
HP:0000980Pallor
Occasional (29-5%)
HP:0001231Abnormal fingernail morphology
HP:0012143Abnormal megakaryocyte morphology
HP:0012137Abnormal number of granulocyte precursors
HP:0031035Chronic infection
HP:0012136Dysplastic granulopoesis
HP:0002240Hepatomegaly
HP:0001931Hypochromic anemia
HP:0011447Hyposegmentation of neutrophil nuclei
HP:0002863Myelodysplasia
HP:0001744Splenomegaly
HP:0001873Thrombocytopenia
Very rare (<4-1%)
HP:0001892Abnormal bleeding
HP:0004808Acute myeloid leukemia
HP:0005528Bone marrow hypocellularity
HP:0001635Congestive heart failure
HP:0001875Decreased total neutrophil count
HP:0001913Granulocytopenia
HP:0005513Increased megakaryocyte count
HP:0001974Increased total leukocyte count
HP:0001876Pancytopenia
HP:0001894Thrombocytosis

Run the differential on the 2 obligate / very frequent terms

Annotation source: 30725758[PMID]_1625471[PMID]_10792275[PMID]

7

Sources for this card