raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:633021

SLC12A2-related autosomal recessive neonatal-developmental delay-intellectual disability-feeding difficulty-sensorineural deafness syndrome

Synonyms: Kilquist syndrome

Type
Clinical subtype
Group
Subtype of disorder
Inheritance
Autosomal recessive
Status
active

A rare form of SLC12A2-related developmental delay-intellectual disability-sensorineural deafness syndrome characterized by profound global developmental delay, impaired intellectual development, absent speech, sensorineural hearing loss, and hypotonia (present at birth). Patients have poor overall growth with severe feeding difficulties associated with gastrointestinal anomalies (including gastroesophageal reflux, midgut malrotation). Secretory dysfunction (including tear, sweat, and saliva production) causing dry mouth and recurrent bronchial mucus plugging are commonly observed. Differing from other form of the syndrome, these patients are often present with mild and non specific dysmorphic features (narrow forehead, oblong face, low-set ears, wide mouth, mandibular prognathia) and have multiple malformations (gastrointestinal, brain, choanal).

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Names in Orphadata languages

10 of 12 languages
LangNameSynonyms
enSLC12A2-related autosomal recessive neonatal-developmental delay-intellectual disability-feeding difficulty-sensorineural deafness syndromeKilquist syndrome
frSyndrome de retard de développement néonatal autosomique récessif-déficience intellectuelle-difficulté d'alimentation-surdité neurosensorielle associé à SLC12A2Syndrome de Kilquist
deAutosomal-rezessives SLC12A2-assoziiertes Syndrom mit neonataler Entwicklungsverzögerung, Intelligenzminderung und sensorineuraler SchwerhörigkeitKilquist-Syndrom
esSíndrome de sordera neurosensorial-retraso del desarrollo-discapacidad intelectual-dificultad para alimentarse autosómico recesivo asociado a SLC12A2
itSindrome autosomica recessiva neonatale-ritardo dello sviluppo - disabilità intellettiva-difficoltà di alimentazione-sordità neurosensoriale SLC12A2 correlata
nlSLC12A2-gerelateerd autosomaal recessief neonataal ontwikkelingsachterstand - intellectuele achterstand - voedingsproblemen- sensorineurale doofheid-syndroom
ptSíndrome neonatal de perturbação intelectual e do desenvolvimento-dificuldades alimentares-surdez neurossensorial autossómico recessivo SLC12A2-relacionada
plZwiązany z SLC12A2 autosomalny recesywny zespół opóźnienia rozwoju, niepełnosprawności intelektualnej, problemów z karmieniem oraz niedosłuchu zmysłowo-nerwowego o początku w okresie noworodkowym= en
csSyndrom související s SLC12A2 s autozomálně recesivní dědičností zahrnující novorozenecké opoždění vývoje, mentální retardaci, potíže s krmením a senzorineurální hluchotu= en
ukSLC12A2-повязаний аутосомно-рецесивний синдром затримки неонатального розвитку-інтелектуальної недостатності-труднощів з вигодовуванням-сенсоневральної глухотиСиндром Кілквіста

Definition in:

2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM619080Evalidated
ICD-10Q87.8NTBTattributedvalidated
ICD-11LD90.YNTBTattributedvalidated
MONDO0859761Evalidated
UMLSC5436756Evalidated

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 (1):

No children.

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Genes

1 direct
GeneAssociationStatusHGNCEnsemblOMIMLocusNameSource of validation
SLC12A2Disease-causing germline mutation(s) inAssessedHGNC:10911ENSG000000646516008405q23.3solute carrier family 12 member 234797034[PMID]
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Prevalence and incidence

0 records

No prevalence record in this release.

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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