raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:2802

X-linked sideroblastic anemia and spinocerebellar ataxia

Synonyms: Pagon-Bird-Detter syndrome · X-linked sideroblastic anemia with ataxia · XLSA-A

Type
Disease
Group
Disorder
Inheritance
X-linked recessive
Age of onset
Childhood, Infancy
Status
active

A rare syndromic, inherited form of sideroblastic anemia characterized by mild to moderate anemia (with hypochromia and microcytosis) and early-onset, non- or slowly progressive spinocerebellar ataxia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enX-linked sideroblastic anemia and spinocerebellar ataxiaPagon-Bird-Detter syndrome · X-linked sideroblastic anemia with ataxia · XLSA-A
frAnémie sidéroblastique liée à l'X et ataxie spinocérébelleuseAnémie sidéroblastique liée à l'X avec ataxie · Syndrome de Pagon-Bird-Detter · XLSA-A
deX-chromosomale sideroblastische Anämie und spinozerebelläre AtaxiePagon-Bird-Detter-Syndrom · X-chromosomale sideroblastische Anämie und Ataxie · XLSA-A
esAnemia sideroblástica ligada al cromosoma X y ataxia espinocerebelosaAnemia sideroblástica ligada al cromosoma X con ataxia · Síndrome de Pagon-Bird-Detter · XLSA-A
itAnemia sideroblastica legata all'X e atassia spinocerebellareAnemia sideroblastica legata all'X con atassia · XLSA-A
nlX-gebonden sideroblastische anemie en spinocerebellaire ataxieSyndroom van Pagon-Bird-Detter · X-gebonden sideroblastische anemie met ataxie · XLSA-A
ptAnemia sideroblástica-ataxia espinocerebelosa ligada ao X
plNiedokrwistość syderoblastyczna sprzężona z chromosomem X i ataksjaXLSA-A · Zespół Pagon, Birda i Dettera · Niedokrwistość syderoblastyczna sprzężona z chromosomem X i z ataksją
csX-vázaná sideroblastická anémie a ataxieX-vázaná sideroblastická anémie s ataxií · XLSA-A
ukХ-зчеплена сидеробластна анемія та спіноцеребеллярна атаксіяСиндром Пагона-Берд-Деттера · Х-зчеплена сидеробластна анемія з атаксією · XLSA-A
zhX连锁铁粒幼细胞贫血和脊髓小脑共济失调X连锁铁粒幼细胞性贫血伴共济失调
trX'e bağlı sideroblastik anemi ve spinoserebellar ataksiXLSA-A · Pagon-Bird-Detter sendromu · Ataksi ile seyreden X'e bağlı sideroblastik anemi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM301310Evalidated
ICD-10D64.0NTBTattributedvalidated
ICD-113A72.01NTBTindexvalidated
MONDO0010524Evalidated
MeSHC536358Evalidated
UMLSC1845028Evalidated
GARD668Evalidated

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 (4):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
ABCB7Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:48ENSG00000131269300135Xq13.3ATP binding cassette subfamily B member 720301496[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families13 casesWorldwideCase(s)Validated22398176[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidated22398176[PMID]_ORPHANET

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

32 annotations · validated 2024-01-22
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0002167Abnormality of speech or vocalization
HP:0001903Anemia
HP:0001251Ataxia
HP:0031936Delayed ability to walk
HP:0002066Gait ataxia
HP:0012187Increased erythrocyte protoporphyrin concentration
Frequent (79-30%)
HP:0011273Anisocytosis
HP:0001348Brisk reflexes
HP:0002194Delayed gross motor development
HP:0000750Delayed speech and language development
HP:0001260Dysarthria
HP:0001347Hyperreflexia
HP:0004840Hypochromic microcytic anemia
HP:0000639Nystagmus
HP:0002172Postural instability
HP:0001924Sideroblastic anemia
HP:0000486Strabismus
Occasional (29-5%)
HP:0000717Autism
HP:0001272Cerebellar atrophy
HP:0002075Dysdiadochokinesis
HP:0001310Dysmetria
HP:0001510Growth delay
HP:0001252Hypotonia
HP:0034499Increased bone marrow iron
HP:0020081Pappenheimer bodies
HP:0004447Poikilocytosis
Very rare (<4-1%)
HP:0100543Cognitive impairment
HP:0000028Cryptorchidism
HP:0000716Depression
HP:0001992Organic aciduria
HP:0100753Schizophrenia
HP:0001250Seizure

Run the differential on the 6 obligate / very frequent terms

Annotation source: 34354969[PMID]_4045952[PMID]_11118249[PMID]_22398176[PMID]

7

Sources for this card