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PEHO (Progressive encephalopathy with Edema, Hypsarrhythmia and Optic atrophy) syndrome is a rare neurodegenerative disorder belonging to the group of infantile progressive encephalopathies.
Features include very common findings: Epicanthus, Hypsarrhythmia, Seizure, and Short nose and others; and common findings: Shrinkage of the cerebellum (cerebellar atrophy), Gingival overgrowth, Hydrocephalus, and Microcephaly and others. 61 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 13 | Seizure, Profound intellectual disability, Infantile encephalopathy |
ZNHIT3 function has not been fully characterized.
PEHO syndrome is associated with mutations in the ZNHIT3 gene on chromosome 17.
Genetic testing for ZNHIT3 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for PEHO syndrome has been reported in the published literature.
Phenotype severity distribution: 27 very common features, 14 common features.
Estimated prevalence: Unknown (Unknown prevalence).
No clinical trials have been registered for PEHO syndrome.
105 publications have been identified in PubMed for PEHO syndrome. Kisho has analyzed 31 by research type. Research spans Review / Meta-Analysis (52%), Basic Science / Preclinical (26%), and Clinical Trial Publication (10%).
Research Type | Count | % of Total |
|---|---|---|
Research summaries | 16 | 52% |
Data assembled from 6 of 12 sources · Last updated Sep 18, 2026, 7:51 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about PEHO syndrome
Muscles |
9 |
Shrinkage of the cerebellum (cerebellar atrophy), Severe muscular hypotonia, Generalized hypotonia |
Head and neck | 5 | Tented upper lip vermilion, Progressive microcephaly, Abnormal palate morphology |
Arms and legs | 3 | Edema of the dorsum of feet, Tapered finger, Edema of the dorsum of hands |
Digestive system | 2 | Feeding difficulties in infancy, Feeding difficulties |
Eyes | 2 | Damage to the optic nerve (optic atrophy), Abnormal eye movements (abnormality of eye movement) |
Bones and joints | 1 | Limitation of joint mobility |
Lungs and breathing | 1 | Recurrent respiratory infections |
Blood and immune system | 1 | Recurrent respiratory infections |
Laboratory research
8 |
26% |
Clinical study results | 3 | 10% |
Other research | 1 | 3% |
Testing and diagnosis research | 1 | 3% |
Patient case studies | 1 | 3% |
Disease patterns and progression | 1 | 3% |
Chen F (2026). [PMID: 41857137](https://pubmed.ncbi.nlm.nih.gov/41857137/). *Cell Death Differ*. [Basic Science / Preclinical]
Ortiz-Perez S (2026). [PMID: 32809455](https://pubmed.ncbi.nlm.nih.gov/32809455/). *Unknown Journal*. [Basic Science / Preclinical]
Bonde LD (2026). [PMID: 41383020](https://pubmed.ncbi.nlm.nih.gov/41383020/). *HGG Adv*. [Basic Science / Preclinical]
Giustina A (2026). [PMID: 41435994](https://pubmed.ncbi.nlm.nih.gov/41435994/). *Metabolism*. [Review / Meta-Analysis]
Munakomi S (2026). [PMID: 31082057](https://pubmed.ncbi.nlm.nih.gov/31082057/). *Unknown Journal*. [Epidemiology / Natural History]
Olby NJ (2026). [PMID: 41442884](https://pubmed.ncbi.nlm.nih.gov/41442884/). *J Am Vet Med Assoc*. [Review / Meta-Analysis]
Liu CH (2026). [PMID: 41193695](https://pubmed.ncbi.nlm.nih.gov/41193695/). *Nat Rev Endocrinol*. [Review / Meta-Analysis]
Wirth T (2025). [PMID: 40983776](https://pubmed.ncbi.nlm.nih.gov/40983776/). *Nat Rev Neurol*. [Review / Meta-Analysis]
Hao JQ (2025). [PMID: 40194361](https://pubmed.ncbi.nlm.nih.gov/40194361/). *Ecotoxicol Environ Saf*. [Basic Science / Preclinical]
Caldiroli L (2025). [PMID: 40192621](https://pubmed.ncbi.nlm.nih.gov/40192621/). *J Cachexia Sarcopenia Muscle*. [Review / Meta-Analysis]