raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:79134

DEND syndrome

Synonyms: Developmental delay-epilepsy-neonatal diabetes syndrome

Type
Disease
Group
Disorder
Inheritance
Autosomal dominant, Autosomal recessive, Not applicable
Age of onset
Infancy, Neonatal
Status
active

A rare form of neonatal diabetes mellitus characterized by a triad of Developmental delay, Epilepsy, and Neonatal Diabetes (DEND syndrome), with a generally severe course. This form of neonatal diabetes is not associated with abnormal pancreatic development.

1

Names in Orphadata languages

12 of 12 languages
LangNameSynonyms
enDEND syndromeDevelopmental delay-epilepsy-neonatal diabetes syndrome
frSyndrome DENDSyndrome de retard de développement-épilepsie-diabète néonatal
deDEND-SyndromEntwicklungsverzögerung-Epilepsie-neonataler Diabetes-Syndrom
esSíndrome DENDSíndrome de retraso del crecimiento-epilepsia-diabetes neonatal
itSindrome DENDSindrome ritardo dello sviluppo-epilessia-diabete neonatale
nlDEND-syndroomOntwikkelingsachterstand - epilepsie - neonatale diabetes-syndroom
ptSíndrome DENDSíndrome de perturbação do desenvolvimento-epilepsia-diabetes neonatal
plZespół DENDZespół opóźnienia w rozwoju, padaczki i cukrzycy noworodków
csDEND syndromSyndrom zahrnující opoždění vývoje, epilepsii a neonatální diabetes
ukСиндром DENDСиндром затримки розвитку - епілепсії - неонатального діабету
zhDEND综合征发育迟缓-癫痫-新生儿糖尿病综合征
trDEND sendromuGelişme geriliği-epilepsi-yenidoğan diyabet sendromu

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM606176NTBTvalidated
ICD-10P70.2NTBTattributedvalidated
ICD-11KB60.2YNTBTindexvalidated
MONDO0019207Evalidated
UMLSC4303593Evalidated

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

3 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
KCNJ11Disease-causing germline mutation(s) (gain of function) inAssessedHGNC:6257ENSG0000018748660093711p15.1potassium inwardly rectifying channel subfamily J member 1122498247[PMID]_17652641[PMID]_22145471[PMID]_23382304[PMID]_24150202[PMID]_24912436[PMID]
ABCC8Disease-causing germline mutation(s) inAssessedHGNC:59ENSG0000000607160050911p15.1ATP binding cassette subfamily C member 822498247[PMID]_21109997[PMID]
NARS2Disease-causing germline mutation(s) inAssessedHGNC:26274ENSG0000013751361280311q14.1asparaginyl-tRNA synthetase 2, mitochondrial35703918[PMID]
5

Prevalence and incidence

2 records
TypeClassValueAreaQualificationValidationSource
Cases/families40 casesWorldwideCase(s)Validated16670688[PMID]
Point prevalence<1 / 1 000 000—WorldwideClass onlyValidatedORPHANET

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

19 annotations · validated 2017-01-11
HPOTerm (as annotated by Orphanet)Diagnostic
Obligate (100%)
HP:0003074Hyperglycemia
Very frequent (99-80%)
HP:0040217Elevated hemoglobin A1c
Frequent (79-30%)
HP:0008936Axial hypotonia
HP:0011342Mild global developmental delay
HP:0001324Muscle weakness
HP:0001250Seizure
Occasional (29-5%)
HP:0000463Anteverted nares
HP:0001488Bilateral ptosis
HP:0040025Clinodactyly of the 4th finger
HP:0001944Dehydration
HP:0002714Downturned corners of mouth
HP:0002521Hypsarrhythmia
HP:0000343Long philtrum
HP:0009830Peripheral neuropathy
HP:0005487Prominent metopic ridge
HP:0003196Short nose
HP:0009894Thickened ears
HP:0002013Vomiting
Excluded (0%)
HP:0030057Autoimmune antibody positivity

Run the differential on the 2 obligate / very frequent terms

Annotation source: 16670688[PMID]_15448107[PMID]_17259376[PMID]_15115830[PMID]

7

Sources for this card