raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:99812

LIG4 syndrome

Synonyms: DNA ligase IV syndrome · SCID with macrocephaly due to DNA ligase IV deficiency

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

LIG4 syndrome is a hereditary disorder associated with impaired DNA double-strand break repair mechanisms and characterized by microcephaly, unusual facial features, growth and developmental delay, skin anomalies, and pancytopenia, which is associated with combined immunodeficiency (CID).

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enLIG4 syndromeDNA ligase IV syndrome · SCID with macrocephaly due to DNA ligase IV deficiency
frSyndrome LIG4Immunodéficience combinée sévère par déficit en DNA ligase IV
deLIG4-SyndromSCID mit Makrozephalie durch DNA-Ligase-IV-Mangel · DNA-Ligase IV-Mangel · Ligase 4-Syndrom
esSíndrome LIG4IDCG con macrocefalia por deficiencia de ADN ligasa IV · SCID con macrocefalia por deficiencia de ADN ligasa IV · Síndrome de ADN ligasa IV
itSindrome LIG4SCID con microcefalia da deficit di DNA ligasi IV · Sindrome della ligasi 4
nlLIG4-syndroomErnstige gecombineerde immuundeficiëntie met macrocefalie door deficiëntie van DNA ligase IV · DNA ligase IV-syndroom · SCID met macrocefalie door deficiëntie van DNA ligase IV
ptSíndrome LIG4
plZespół LIG4Niedobór ligazy DNA IV · Zespół ligazy 4
csLIG4 syndromDeficit DNA ligázy IV · Ligáza 4 syndrom
ukСиндром LIG4Дефіцит ДНК-лігази IV · Синдром лігази 4
zhLIG4综合征DNA连接酶IV缺陷
trLIG4 sendromuLigaz 4 sendromu · DNA ligaz IV eksikliği

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM606593Evalidated
ICD-10D81.1NTBTattributedvalidated
ICD-114A01.1YNTBTindexvalidated
MONDO0011686Evalidated
MeSHC564694Evalidated
UMLSC1847827Evalidated

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
LIG4Disease-causing germline mutation(s) inAssessedHGNC:6601ENSG0000017440560183713q33.3DNA ligase 423372718[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families28 casesWorldwideCase(s)Validated27717373[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET_27717373[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

35 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0003220Abnormality of chromosome stability
HP:0000320Bird-like facies
HP:0001263Global developmental delay
HP:0001510Growth delay
HP:0002721Immunodeficiency
HP:0000252Microcephaly
Frequent (79-30%)
HP:0005561Abnormality of bone marrow cell morphology
HP:0002488Acute leukemia
HP:0004422Biparietal narrowing
HP:0000248Brachycephaly
HP:0000444Convex nasal ridge
HP:0000992Cutaneous photosensitivity
HP:0000286Epicanthus
HP:0010783Erythema
HP:0001249Intellectual disability
HP:0000294Low anterior hairline
HP:0002665Lymphoma
HP:0000347Micrognathia
HP:0001876Pancytopenia
HP:0004430Severe combined immunodeficiency
HP:0000506Telecanthus
HP:0000233Thin vermilion border
HP:0000582Upslanted palpebral fissure
HP:0000431Wide nasal bridge
Occasional (29-5%)
HP:0000924Abnormality of the skeletal system
HP:0004209Clinodactyly of the 5th finger
HP:0000028Cryptorchidism
HP:0002240Hepatomegaly
HP:0008736Hypoplasia of penis
HP:0000821Hypothyroidism
HP:0001974Increased total leukocyte count
HP:0002716Lymphadenopathy
HP:0002024Malabsorption
HP:0100585Telangiectasia of the skin
HP:0005978Type II diabetes mellitus

Run the differential on the 6 obligate / very frequent terms

Annotation source: 16088910[PMID]

7

Sources for this card