raremaprare-disease reference indexOrphadata 2026-06-23 · HPO 2026-09-01
ORPHA:700336

Hypotonia-speech impairment-severe cognitive delay syndrome due to NALCN deficiency

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

Orphadata ships no English definition for this code.

1

Names in Orphadata languages

9 of 12 languages
LangNameSynonyms
enHypotonia-speech impairment-severe cognitive delay syndrome due to NALCN deficiency
frSyndrome d'hypotonie-trouble sévère du langage-retard cognitif sévère par déficit en NALCN
deHypotonie-Sprachstörung-schwere kognitive Entwicklungsverzögerung-Syndrom, NALCN-assoziiertIHPRF1 · Infantile Hypotonie mit psychomotorischer Entwicklungsverzögerung und charakteristischem Gesichtsausdruck 1
esSíndrome de hipotonía-trastorno del habla-retraso cognitivo grave por deficiencia de NALCN
itSindrome ipotonia-deficit del linguaggio-grave ritardo cognitivo da deficit di NALCN
nlHypotonie - spraakstoornis - ernstige cognitieve achterstand-syndroom door NALCN-deficiëntie
ptHypotonia-speech impairment-severe cognitive delay syndrome due to NALCN deficiency
plHypotonia-speech impairment-severe cognitive delay syndrome due to NALCN deficiency
csHypotonia-speech impairment-severe cognitive delay syndrome due to NALCN deficiency
2

Cross-references

qualifier = Orphanet mapping relation
SourceCodeQualifierICD relationValidation
OMIM615419Evalidated
ICD-10Q87.8NTBTattributednot yet validated
ICD-11LD90.YNTBTattributednot yet validated

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
NALCNDisease-causing germline mutation(s) inAssessedHGNC:19082ENSG0000010245261154913q32.3-q33.1sodium leak channel, non-selective23749988[PMID]_24075186[PMID]
5

Prevalence and incidence

0 records

No prevalence record in this release.

6

HPO phenotypes

Orphanet has no HPO annotation for this code in this release.

7

Sources for this card