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Any neurodevelopmental disorder in which the cause of the disease is a mutation in the KCNH1 gene. Variants in KCNH1 cause significant neurodevelopmental disabilities that lie along a phenotypic spectrum ranging from non-syndromic to syndromic. The most common phenotypes associated with variants in KCNH1 include intellectual disability, seizures, hypotonia, absence or hypoplasia of nails, and gingival enlargement. Hypoplastic terminal phalanges of fingers and toes, proximal placement and long thumb, and long toes present less frequently.
Biomarker and diagnostic research for KCNH1 associated disorder has been reported in the published literature.
No clinical trials have been registered for KCNH1 associated disorder.
8 publications have been identified in PubMed for KCNH1 associated disorder. Research spans Diagnostic / Biomarker (25%), Review / Meta-Analysis (25%), and Basic Science / Preclinical (25%).
Bernert A (2026). [PMID: 41656275](https://pubmed.ncbi.nlm.nih.gov/41656275/). *Mol Brain*. [Basic Science / Preclinical]
Sundman AK (2026). [PMID: 40986435](https://pubmed.ncbi.nlm.nih.gov/40986435/). *Brain*. [Review / Meta-Analysis]
Ke Z (2025). [PMID: 40302348](https://pubmed.ncbi.nlm.nih.gov/40302348/). *Front Biosci (Landmark Ed)*. [Diagnostic / Biomarker]
Do NM (2025). [PMID: 40604848](https://pubmed.ncbi.nlm.nih.gov/40604848/). *BMC Oral Health*. [Case Report / Case Series]
Wu R (2024). [PMID: 38764027](https://pubmed.ncbi.nlm.nih.gov/38764027/). *Orphanet J Rare Dis*. [Epidemiology / Natural History]
Chen D (2024). [PMID: 38372889](https://pubmed.ncbi.nlm.nih.gov/38372889/). *Hum Cell*. [Basic Science / Preclinical]
Data assembled from 2 of 12 sources · Last updated Sep 18, 2026, 1:11 PM UTC
Common questions about KCNH1 associated disorder
Osorio LA (2024). [PMID: 38732154](https://pubmed.ncbi.nlm.nih.gov/38732154/). *Int J Mol Sci*. [Diagnostic / Biomarker]
Liu L (2024). [PMID: 38996525](https://pubmed.ncbi.nlm.nih.gov/38996525/). *Schizophr Res*. [Review / Meta-Analysis]