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Autosomal recessive spastic paraplegia type 23 (SPG23) is a rare, complex type of hereditary spastic paraplegia that presents in childhood with progressive spastic paraplegia, associated with peripheral neuropathy, skin pigment abnormalities (i.e. vitiligo, hyperpigmentation, diffuse lentigines), premature graying of hair, and characteristic facies (i.e. thin with ''sharp'' features). The SPG23 phenotype has been mapped to a locus on chromosome 1q24-q32.
Features include always present findings: Mild intellectual disability, Babinski sign, Hyperpigmentation in sun-exposed areas, and Premature graying of body hair and others; and common findings: Vitiligo, Microcephaly, Multiple lentigines, and Loss of ambulation and others. 27 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 8 | Mild intellectual disability, Babinski sign, Peripheral neuropathy |
Skin | 2 | Vitiligo, Hyperpigmentation in sun-exposed areas |
Head and neck | 2 | Narrow face, Microcephaly |
Bones and joints | 2 | Sideways curvature of the spine (scoliosis), Kyphoscoliosis |
Muscles | 2 | Lower limb muscle weakness, Loss of ambulation |
Arms and legs | 1 | Lower limb muscle weakness |
Kidneys and urinary system | 1 | Horseshoe kidney |
Growth and development | 1 | Short stature |
DSTYK encodes dual serine/threonine and tyrosine protein kinase (929 aa). Acts as a positive regulator of ERK phosphorylation downstream of fibroblast growth factor-receptor activation. Highest expression in Brain Cerebellar Hemisphere (33.1 TPM) and Brain Cerebellum (25.4 TPM).
Hereditary spastic paraplegia 23 is associated with mutations in the DSTYK gene on chromosome 1.
DSTYK is classified as a druggable target (Druggable Genome, Enzyme, Kinase, and Serine Threonine Kinase categories) with score 0.0.
Genetic testing for DSTYK is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for hereditary spastic paraplegia 23 has been reported in the published literature.
Phenotype severity distribution: 5 always present features, 13 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for hereditary spastic paraplegia 23.
21 publications have been identified in PubMed for hereditary spastic paraplegia 23. Research spans Basic Science / Preclinical (43%), Epidemiology / Natural History (19%), and Clinical Trial Publication (14%).
Research Type | Count | % of Total |
|---|---|---|
Laboratory research | 9 | 43% |
Disease patterns and progression | 4 | 19% |
Clinical study results | 3 | 14% |
Testing and diagnosis research | 2 | 10% |
Research summaries | 2 | 10% |
Patient case studies | 1 | 5% |
Amprosi M (2026). [PMID: 41586880](https://pubmed.ncbi.nlm.nih.gov/41586880/). *Journal of neurology*. [Epidemiology / Natural History]
Xu J (2026). [PMID: 41559004](https://pubmed.ncbi.nlm.nih.gov/41559004/). *Molecular genetics & genomic medicine*. [Basic Science / Preclinical]
de Lima FD (2025). [PMID: 40993748](https://pubmed.ncbi.nlm.nih.gov/40993748/). *Orphanet journal of rare diseases*. [Clinical Trial Publication]
Cozzi M (2025). [PMID: 40524150](https://pubmed.ncbi.nlm.nih.gov/40524150/). *Cell communication and signaling : CCS*. [Basic Science / Preclinical]
Jimoh IJ (2025). [PMID: 39978794](https://pubmed.ncbi.nlm.nih.gov/39978794/). *Clinical genetics*. [Diagnostic / Biomarker]
Wu L (2025). [PMID: 41264248](https://pubmed.ncbi.nlm.nih.gov/41264248/). *Proceedings of the National Academy of Sciences of the United States of America*. [Epidemiology / Natural History]
Yu Z (2025). [PMID: 39776381](https://pubmed.ncbi.nlm.nih.gov/39776381/). *Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology*. [Basic Science / Preclinical]
Mooijekind B (2025). [PMID: 40543407](https://pubmed.ncbi.nlm.nih.gov/40543407/). *Clinical biomechanics (Bristol, Avon)*. [Basic Science / Preclinical]
Di Folco C (2025). [PMID: 40832806](https://pubmed.ncbi.nlm.nih.gov/40832806/). *Movement disorders : official journal of the Movement Disorder Society*. [Case Report / Case Series]
Özdemir TR (2025). [PMID: 40445718](https://pubmed.ncbi.nlm.nih.gov/40445718/). *Annals of Indian Academy of Neurology*. [Clinical Trial Publication]
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 5:33 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center