raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:240760

Nijmegen breakage syndrome-like disorder

Synonyms: Microcephaly and chromosomal instability without immunodeficiency · NBS-like disorder · NBSLD · RAD50 deficiency

Type
Malformation syndrome
Group
Disorder
Inheritance
Autosomal recessive
Age of onset
Neonatal
Status
active

Nijmegen breakage syndrome-like disorder is a rare, genetic multiple congenital anomalies/dysmorphic syndrome characterized by growth retardation, short stature, developmental delay, intellectual disability, craniofacial dysmorphism (i.e. severe microcephaly, sloping forehead, prominent eyes, broad nasal ridge, hypoplastic nasal septum, epicanthal folds), spontaneous chromosomal instability, cellular hypersensitivity to ionizing radiation and radioresistant DNA synthesis, without severe infections, immunodeficiency or cancer predisposition. Additional reported features include mild spasticity, slight and nonprogressive ataxia, hyperopia, multiple pigmented nevi, widely spaced nipples, and clinodactyly.

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Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enNijmegen breakage syndrome-like disorderMicrocephaly and chromosomal instability without immunodeficiency · NBS-like disorder · NBSLD · RAD50 deficiency
frSyndrome de Nijmegen-likeDéficit en RAD50 · Microcéphalie et instabilité chromosomique sans immunodéficience · NBSLD · Syndrome de Nimègue-like
deNijmegen-Breakage-Syndrom-ähnliche Krankheit
esTrastorno similar al síndrome de rotura de NijmegenDeficiencia de RAD50 · Microcefalia e inestabilidad cromosómica sin inmunodeficiencia · Trastorno tipo NBS
itMalattia simile alla sindrome da rotture cromosomiche di NijmegenDeficit di RAD50 · Disturbo NBS-simile · Microcefalia e instabilità cromosomica senza immunodeficienza · NBSLD
nlNijmegen-breuksyndroom-achtige aandoeningMicrocefalie en chromosomale instabiliteit zonder immuundeficiëntie · NBS-achtige aandoening · NBSLD · RAD50-deficiëntie
ptDoença síndrome de quebras de Nijmegen-like
plZaburzenie podobne do zespołu NijmegenMałogłowie i niestabilność chromosomalna bez niedoboru odporności · NBSLD · Niedobór RAD50 · Zaburzenie podobne do NBS
csPorucha podobná nijmegenskému breakage syndromuMikrocefalie a chromozomální nestabilita bez imunodeficience · NBS-like disorder · NBSLD · RAD50
ukЗахворювання, подібне до синдрому НеймегенаМікроцефалія та хромосомна нестабільність без імунодефіциту · NBSLD · NBS-подібний розлад · Дефіцит RAD50
zh奈梅亨断裂综合征样障碍小头畸形和染色体不稳定不伴免疫缺陷
trNijmegen kırılma sendromu-benzeri bozuklukNBSLD · RAD50 eksikliği · NBS-benzeri bozukluk · İmmün yetmezlik olmayan mikrosefali ve kromozomal instabilitesi

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM613078Evalidated
ICD-10Q87.8NTBTattributedvalidated
ICD-114A01.31NTBTindexvalidated
MONDO0013118Evalidated
MeSHC567767Evalidated
UMLSC2751318Evalidated

E exact · NTBT this ORPHAcode is narrower than the target · BTNT broader than the target · ND not decided.

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Classification

Preferential parent (Orphanet linearisation):

Parents in the classifications (4):

No children.

4

Genes

2 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
MRE11Disease-causing germline mutation(s) (loss of function) inAssessedHGNC:7230ENSG0000002092260081411q21MRE11 double strand break repair nuclease21227757[PMID]
RAD50Disease-causing germline mutation(s) inAssessedHGNC:9816ENSG000001135226040405q31.1RAD50 double strand break repair protein19409520[PMID]
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Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families1 casesWorldwideCase(s)Validated1887849[PMID]_19409520[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_1887849[PMID]_19409520[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.

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HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

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Sources for this card