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Any combined oxidative phosphorylation deficiency in which the cause of the disease is a mutation in the SFXN4 gene.
Features include always present findings: Delayed speech and language development, Increased circulating lactate concentration, Low muscle tone (hypotonia), and Decreased activity of mitochondrial complex I and others; and common findings: Skeletal muscle atrophy, Oligohydramnios, Mild intellectual disability, and Dysmetria and others.
Data assembled from 6 of 12 sources · Last updated Sep 20, 2026, 9:48 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 4 | Mild intellectual disability, Delayed speech and language development, Delayed fine motor development |
Muscles | 2 | Skeletal muscle atrophy, Low muscle tone (hypotonia) |
Lab test results | 2 | Increased circulating lactate concentration, Decreased activity of mitochondrial complex I |
Blood and immune system | 2 | Macrocytic anemia, Hypersegmentation of neutrophil nuclei |
Bones and joints | 1 | Skeletal muscle atrophy |
Eyes | 1 | Visual impairment |
Growth and development | 1 | Intrauterine growth retardation |
SFXN4 function has not been fully characterized.
Growth and developmental delay-hypotonia-vision impairment-lactic acidosis syndrome is associated with mutations in the SFXN4 gene on chromosome 10.
Genetic testing for SFXN4 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for growth and developmental delay-hypotonia-vision impairment-lactic acidosis syndrome has been reported in the published literature.
Phenotype severity distribution: 7 always present features, 11 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for growth and developmental delay-hypotonia-vision impairment-lactic acidosis syndrome.
18 publications have been identified in PubMed for growth and developmental delay-hypotonia-vision impairment-lactic acidosis syndrome. Research spans Basic Science / Preclinical (61%), Case Report / Case Series (17%), and Other (6%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 11 | 61% |
Patient case studies | 3 | 17% |
Other research | 1 | 6% |
Testing and diagnosis research | 1 | 6% |
Clinical study results | 1 | 6% |
Disease patterns and progression | 1 | 6% |
Gao K (2026). [PMID: 41526984](https://pubmed.ncbi.nlm.nih.gov/41526984/). *Cell Biosci*. [Basic Science / Preclinical]
Rider P (2026). [PMID: 41508119](https://pubmed.ncbi.nlm.nih.gov/41508119/). *J Exp Clin Cancer Res*. [Basic Science / Preclinical]
D'Amato G (2026). [PMID: 41635899](https://pubmed.ncbi.nlm.nih.gov/41635899/). *Case Rep Genet*. [Basic Science / Preclinical]
Keser M (2026). [PMID: 40352449](https://pubmed.ncbi.nlm.nih.gov/40352449/). *Mol Syndromol*. [Basic Science / Preclinical]
Lin KY (2026). [PMID: 42009009](https://pubmed.ncbi.nlm.nih.gov/42009009/). *Lancet Neurol*. [Clinical Trial Publication]
Chen YL (2025). [PMID: 40025060](https://pubmed.ncbi.nlm.nih.gov/40025060/). *Cell Death Discov*. [Basic Science / Preclinical]
Proust A (2025). [PMID: 40420159](https://pubmed.ncbi.nlm.nih.gov/40420159/). *J Neuroinflammation*. [Basic Science / Preclinical]
Distelmaier F (2025). [PMID: 40929079](https://pubmed.ncbi.nlm.nih.gov/40929079/). *Brain*. [Basic Science / Preclinical]
Goto M (2025). [PMID: 39612554](https://pubmed.ncbi.nlm.nih.gov/39612554/). *Placenta*. [Diagnostic / Biomarker]
Prasun P (2025). [PMID: 39937392](https://pubmed.ncbi.nlm.nih.gov/39937392/). *Stem Cell Rev Rep*. [Other]