raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:251014

2q31.1 microdeletion syndrome

Synonyms: Del(2)(q31.1) · Monosomy 2q31.1

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

2q31.1 microdeletion syndrome is a well-defined and clinically recognisable syndrome characterized by moderate to severe developmental delay, short stature, facial dysmorphism and variable limb defects.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
en2q31.1 microdeletion syndromeDel(2)(q31.1) · Monosomy 2q31.1
frSyndrome de microdélétion 2q31.1Del(2)(q31.1) · Monosomie 2q31.1
deMikrodeletionssyndrom 2q31.1Del(2)(q31.1) · Monosomie 2q31.1
esSíndrome de microdeleción 2q31.1Del(2)(q31.1) · Monosomía 2q31.1
itSindrome da microdelezione 2q31.1Del(2)(q31.1) · Monosomia 2q31.1
nl2q31.1-microdeletiesyndroomDel(2)(q31.1) · Monosomie 2q31.1
ptSíndrome de microdeleção 2q31.1Monossomia 2q31.1
plZespół mikrodelecji 2q31.1Del(2)(q31.1) · Monosomia 2q31.1
csSyndrom mikrodelece 2q31.1Del(2)(q31.1) · Monosomie 2q31.1
ukСиндром мікроделеції 2q31.1Del(2)(q31.1) · Моносомія 2q31.1
zh染色体2q31.1微缺失综合征2q31.1单体
tr2q31.1 mikrodelesyon sendromuDel (2) (q31.1) · Monozomi 2q31.1

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
ICD-10Q93.5NTBTattributedvalidated
ICD-11LD44.20NTBTindexvalidated
MONDO0016652Evalidated
UMLSC4274647Evalidated

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

0 direct

Orphanet records no gene directly on this code.

5

Prevalence and incidence

1 record
TypeClassValueAreaQualificationValidationSource
Point prevalenceUnknown—WorldwideClass onlyNot yet validatedORPHANET

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

63 annotations · validated 2016-06-01
HPOTerm (as annotated by Orphanet)Diagnostic
Very frequent (99-80%)
HP:0001263Global developmental delay
HP:0001249Intellectual disability
Frequent (79-30%)
HP:0005916Abnormal metacarpal morphology
HP:0001595Abnormality of the hair
HP:0001156Brachydactyly
HP:0010059Broad hallux phalanx
HP:0000414Bulbous nose
HP:0100490Camptodactyly of finger
HP:0004209Clinodactyly of the 5th finger
HP:0002002Deep philtrum
HP:0002750Delayed skeletal maturation
HP:0000494Downslanted palpebral fissures
HP:0002714Downturned corners of mouth
HP:0001800Hypoplastic toenails
HP:0001252Hypotonia
HP:0002463Language impairment
HP:0000343Long philtrum
HP:0000369Low-set ears
HP:0000252Microcephaly
HP:0000347Micrognathia
HP:0005487Prominent metopic ridge
HP:0001852Sandal gap
HP:0001250Seizure
HP:0000470Short neck
HP:0012745Short palpebral fissure
HP:0004322Short stature
HP:0001182Tapered finger
HP:0001770Toe syndactyly
HP:0003422Vertebral segmentation defect
Occasional (29-5%)
HP:0002991Abnormal fibula morphology
HP:0040071Abnormal morphology of ulna
HP:0000864Abnormality of the hypothalamus-pituitary axis
HP:0002992Abnormality of tibia morphology
HP:0001631Atrial septal defect
HP:0002120Cerebral cortical atrophy
HP:0000175Cleft palate
HP:0000280Coarse facial features
HP:0000589Coloboma
HP:0000028Cryptorchidism
HP:0100257Ectrodactyly
HP:0000286Epicanthus
HP:0000232Everted lower lip vermilion
HP:0000324Facial asymmetry
HP:0006101Finger syndactyly
HP:0000316Hypertelorism
HP:0000023Inguinal hernia
HP:0000612Iris coloboma
HP:0002808Kyphosis
HP:0000294Low anterior hairline
HP:0000568Microphthalmia
HP:0000275Narrow face
HP:0000588Optic disc coloboma
HP:0000520Proptosis
HP:0000508Ptosis
HP:0002650Scoliosis
HP:0001773Short foot
HP:0004279Short palm
HP:0000486Strabismus
HP:0000664Synophrys
HP:0000233Thin vermilion border
HP:0000243Trigonocephaly
HP:0001629Ventricular septal defect
HP:0002119Ventriculomegaly

Run the differential on the 2 obligate / very frequent terms

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Sources for this card