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NDE1-related microhydranencephaly is a rare, hereditary syndrome with a central nervous system malformation as major feature characterized by extreme microcephaly and growth restriction, severe motor delay and mental retardation, and typical radiological findings of gross dilation of the ventricles resulting from the absence (or severe delay in the development) of cerebral hemispheres, hypoplasia of the corpus callosum, cerebellum, and brainstem. Associated features are thin bones and scalp rugae.
Features include always present findings: Poor head control, Hypoplasia of the brainstem, Agenesis of corpus callosum, and Cutis gyrata of scalp and others. 29 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 9 | Generalized myoclonic seizure, Hypoplasia of the brainstem, Severe intellectual disability |
NDE1 encodes nudE neurodevelopment protein 1 (335 aa). Required for centrosome duplication and formation and function of the mitotic spindle. Essential for the development of the cerebral cortex.
NDE1-related microhydranencephaly is associated with mutations in the NDE1 gene on chromosome 16.
NDE1 is classified as a druggable target with score 0.0.
Genetic testing for NDE1 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for NDE1-related microhydranencephaly has been reported in the published literature.
Phenotype severity distribution: 15 always present features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for NDE1-related microhydranencephaly.
2 publications have been identified in PubMed for NDE1-related microhydranencephaly. Research spans Diagnostic / Biomarker (50%) and Review / Meta-Analysis (50%).
Xiong GJ (2024). [PMID: 38568173](https://pubmed.ncbi.nlm.nih.gov/38568173/). *J Cell Biol*. [Review / Meta-Analysis]
Zhao Y (2024). [PMID: 39473442](https://pubmed.ncbi.nlm.nih.gov/39473442/). *Front Genet*. [Diagnostic / Biomarker]
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 1:03 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about NDE1-related microhydranencephaly
Growth and development
2 |
Short stature, Growth delay |
Bones and joints | 2 | Skeletal muscle atrophy, Multiple joint contractures |
Muscles | 2 | Skeletal muscle atrophy, Multiple joint contractures |
Head and neck | 1 | Microcephaly |