raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:238769

1q44 microdeletion syndrome

Synonyms: Del(1)(q44) · Monosomy 1q44

Type
Malformation syndrome
Group
Disorder
Inheritance
Not applicable, Unknown
Age of onset
Infancy, Neonatal
Status
active

1q44 microdeletion syndrome is a newly described syndrome associated with facial dysmorphism, developmental delay, in particular of expressive speech, seizures and hypotonia.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en1q44 microdeletion syndromeDel(1)(q44) · Monosomy 1q44
frSyndrome de microdélétion 1q44Del(1)(q44) · Monosomie 1q44
deMikrodeletionssyndrom 1q44Del(1)(q44) · Monosomie 1q44
esSíndrome de microdeleción 1q44Del(1)(q44) · Monosomía 1q44
itSindrome da microdelezione 1q44Del(1)(q44) · Monosomia 1q44
nl1q44-microdeletiesyndroomDel(1)(q44) · Monosomie 1q44
ptSíndrome de microdeleção 1q44
plZespół mikrodelecji 1q44Del(1)(q44) · Monosomia 1q44
csMikrodeleční syndrom 1q44Del(1)(q44) · Monozomie 1q44
ukСиндром мікроделеції 1q44Del(1)(q44) · Моносомія 1q44
zh染色体1q44微缺失综合征1q44单体
tr1q44 mikrodelesyon sendromuDel (1) (q44) · Monozomi 1q44

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q93.5NTBTattributedvalidated
ICD-11LD44.10NTBTindexvalidated
MONDO0016561Evalidated
UMLSC4304540Evalidated
GARD10943Evalidated

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 (1):

No children.

4

Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
HNRNPURole in the phenotype ofAssessedHGNC:5048ENSG000001531876028691q44heterogeneous nuclear ribonucleoprotein U28283832[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET
Cases/families100 casesWorldwideCase(s)Validated21800092[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

33 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001274Agenesis of corpus callosum
HP:0002069Bilateral tonic-clonic seizure
HP:0000750Delayed speech and language development
HP:0002263Exaggerated cupid's bow
HP:0001263Global developmental delay
HP:0001252Hypotonia
HP:0010864Intellectual disability, severe
HP:0000233Thin vermilion border
Frequent (79-30%)
HP:0001671Abnormal cardiac septum morphology
HP:0000286Epicanthus
HP:0001510Growth delay
HP:0000316Hypertelorism
HP:0000252Microcephaly
HP:0000347Micrognathia
HP:0004322Short stature
HP:0000319Smooth philtrum
HP:0000486Strabismus
HP:0000506Telecanthus
HP:0000582Upslanted palpebral fissure
HP:0002119Ventriculomegaly
Occasional (29-5%)
HP:0004422Biparietal narrowing
HP:0002007Frontal bossing
HP:0000348High forehead
HP:0000218High palate
HP:0000085Horseshoe kidney
HP:0000238Hydrocephalus
HP:0002566Intestinal malrotation
HP:0007766Optic disc hypoplasia
HP:0000384Preauricular skin tag
HP:0005487Prominent metopic ridge
HP:0002650Scoliosis
HP:0000664Synophrys
HP:0000076Vesicoureteral reflux

Run the differential on the 8 obligate / very frequent terms

Annotation source: 24214579[PMID]_22975012[PMID]

7

Sources for this card