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Neurodevelopmental disorder with epilepsy, cataracts, feeding difficulties, and delayed brain myelination is a syndromic form of severe to profound intellectual disability with onset of delayed psychomotor development and seizures in infancy. Affected children have hypotonia, feeding difficulties resulting in failure to thrive, and inability to speak or walk, and they tend to show repetitive stereotypic behaviors. Brain imaging shows cerebral atrophy and delayed myelination (summary by {1:Schoch et al., 2017}).
Data assembled from 6 of 12 sources · Last updated Sep 20, 2026, 12:37 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Features include always present findings: Seizure, Irritability, Broad nasal tip, and Intellectual disability and others; and very common findings: Low muscle tone (hypotonia) and Motor stereotypy. 26 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 11 | Seizure, Irritability, Intellectual disability |
Muscles | 3 | Low muscle tone (hypotonia), Brain shrinkage (cerebral atrophy), Joint contracture |
Digestive system | 2 | Gastroesophageal reflux, Feeding difficulties |
Bones and joints | 2 | Sideways curvature of the spine (scoliosis), Joint contracture |
Eyes | 1 | Cataract |
Growth and development | 1 | Failure to thrive |
Lungs and breathing | 1 | Obstructive sleep apnea |
Head and neck | 1 | Secondary microcephaly |
NACC1 encodes nucleus accumbens associated 1 (527 aa). Functions as a transcriptional repressor. Seems to function as a transcriptional corepressor in neuronal cells through recruitment of HDAC3 and HDAC4. Highest expression in Cells Cultured fibroblasts (65.0 TPM) and Cells EBV-transformed lymphocytes (61.3 TPM).
Neurodevelopmental disorder with epilepsy, cataracts, feeding difficulties, and delayed brain myelination is associated with mutations in the NACC1 gene on chromosome 19.
The NACC1 protein participates in Positive Regulation of CDH1 Gene Transcription pathway.
NACC1 is classified as a druggable target with score 0.0.
Genetic testing for NACC1 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 6 always present features, 2 very common features, 6 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for neurodevelopmental disorder with epilepsy, cataracts, feeding difficulties, and delayed brain myelination.
2 publications have been identified in PubMed for neurodevelopmental disorder with epilepsy, cataracts, feeding difficulties, and delayed brain myelination. Research spans Case Report / Case Series (100%).
Wu J (2024). [PMID: 39421062](https://pubmed.ncbi.nlm.nih.gov/39421062/). *Front Psychiatry*. [Case Report / Case Series]
Sun DR (2024). [PMID: 38763882](https://pubmed.ncbi.nlm.nih.gov/38763882/). *Zhonghua Er Ke Za Zhi*. [Case Report / Case Series]