raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:231154

Atypical/leaky severe combined immunodeficiency due to partial RAG defect

Synonyms: Atypical/leaky SCID due to partial RAG defect · Atypical/leaky severe combined immunodeficiency due to partial recombination activating gene defect

Type
Disease
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Infancy, Neonatal
Status
active

Combined immunodeficiency due to partial RAG1 deficiency is a form of combined T and B cell immunodeficiency (CID) characterized by severe and persistent cytomegalovirus (CMV) infection and autoimmune cytopenia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enAtypical/leaky severe combined immunodeficiency due to partial RAG defectAtypical/leaky SCID due to partial RAG defect · Atypical/leaky severe combined immunodeficiency due to partial recombination activating gene defect
frDéficit immunitaire combiné sévère atypique/atténué par déficit partiel en RAGDICS atypique/atténué par déficit partiel en RAG · SCID atypique/atténuée par déficit partiel en RAG · Immunodéficience combinée sévère atypique/atténuée par déficit partiel en RAG · Déficit immunitaire combiné sévère atypique/atténué par déficit partiel en protéine recombination activating gene
deAtypischer schwerer kombinierter Immundefekt durch partiellen RAG1-MangelLeaky-SCID durch partiellen RAG1-Defekt · Atypischer/Leaky-SCID mit partieller Rekombinationsaktivierung durch Gendefekt
esInmunodeficiencia combinada grave atípica/con fugas por un defecto parcial de RAGIDCG atípica/con fugas por un defecto parcial de RAG · Inmunodeficiencia combinada grave atípica/con fugas por un defecto parcial del gen activador de recombinación
itImmunodeficienza combinata grave atipica/con perdite da difetto parziale di RAGSCID atipica/con perdite da difetto parziale di RAG · Immunodeficienza combinata grave atipica/con perdite da difetto parziale del gene attivante la ricombinazione
nlAtypische/lekkende ernstige gecombineerde immuundeficiëntie door partieel RAG-defectAtypische/lekkende SCID door partieel RAG-defect · Atypische/lekkende ernstige gecombineerde immuundeficiëntie door partieel defect van recombinatie-activerend gen
ptImunodeficiência combinada por deficiência parcial do RAG1
plZłożony niedobór odporności z powodu częściowego niedoboru RAG1CID powodu częściowego niedoboru RAG1 · CID z ekspansją komórek gamma delta T · Złożony niedobór odporności z ekspansją komórek gamma delta T
csKombinovaná imunodeficience T+ B+ způsobená parciálním RAG1 deficitemCID T+ B+ způsobená parciálním RAG1 deficitem · CID s expanzí gama delta T-buněk
ukКомбінований імунодефіцит, зумовлений частковою недостатністю RAG1КІД через частковий дефіцит RAG1 · КІД з експансією гамма-дельта Т-лімфоцитів · Комбінований імунодефіцит з експансією гамма-дельта Т-клітин
zh部分RAG1基因缺陷所致联合免疫缺陷γδT细胞增生所致联合免疫缺陷
trKısmi RAG1 eksikliğine bağlı kombine immün yetmezlikKısmi RAG1 eksikliğine bağlı CID · Gama delta T hücrelerinin genişlemesi ile seyreden CID · Gama delta T hücrelerinin genişlemesi ile seyreden kombine immün yetmezlik

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM609889Evalidated
ICD-10D81.8NTBTattributedvalidated
ICD-114A01.1YNTBTindexvalidated
MONDO0012359Evalidated
UMLSC4510944Evalidated
GARD13712Evalidated

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

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
RAG1Disease-causing germline mutation(s) inAssessedHGNC:9831ENSG0000016634917961511p12recombination activating 1
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families9 casesWorldwideCase(s)Validated16276422[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_16276422[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

10 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0010976Decreased total B cell count
HP:0005403Decreased total T cell count
HP:0002721Immunodeficiency
HP:0006515Interstitial pneumonitis
HP:0100806Sepsis
HP:0004430Severe combined immunodeficiency
HP:0001744Splenomegaly
Frequent (79-30%)
HP:0001890Autoimmune hemolytic anemia
HP:0001904Neutropenia in presence of anti-neutropil antibodies
Occasional (29-5%)
HP:0002960Autoimmunity

Run the differential on the 7 obligate / very frequent terms

7

Sources for this card