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Primary dystonia DYT6 type is characterized by focal, predominantly cranio-cervical dystonia with dysarthria and dysphagia, or limb dystonia in some cases.
Features include very common findings: Limb dystonia; and common findings: Torticollis, Oromandibular dystonia, Laryngeal dystonia, and Lingual dystonia. 10 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Brain and nerves | 8 | Dysarthria, Limb dystonia, Oromandibular dystonia |
Muscles | 1 | Writer's cramp |
Arms and legs | 1 | Limb dystonia |
THAP1 function has not been fully characterized.
Torsion dystonia 6 is associated with mutations in the THAP1 gene on chromosome 8.
Genetic testing for THAP1 is available. Testing is considered confirmatory for diagnosis.
Biomarker and diagnostic research for torsion dystonia 6 has been reported in the published literature.
Phenotype severity distribution: 1 very common feature, 4 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
1 clinical trial registered, 1 recruiting. Interventions under study include other interventions. Research is primarily sponsored by academic and government institutions.
9 publications have been identified in PubMed for torsion dystonia 6. Research spans Basic Science / Preclinical (33%), Diagnostic / Biomarker (22%), and Review / Meta-Analysis (22%).
Carvalho V (2026). [PMID: 42202611](https://pubmed.ncbi.nlm.nih.gov/42202611/). *Parkinsonism Relat Disord*. [Diagnostic / Biomarker]
Kaymak A (2025). [PMID: 40062447](https://pubmed.ncbi.nlm.nih.gov/40062447/). *European journal of neurology*. [Diagnostic / Biomarker]
Saini A (2025). [PMID: 39749944](https://pubmed.ncbi.nlm.nih.gov/39749944/). *Movement disorders clinical practice*. [Basic Science / Preclinical]
Calakos N (2025). [PMID: 39467044](https://pubmed.ncbi.nlm.nih.gov/39467044/). *Movement disorders : official journal of the Movement Disorder Society*. [Review / Meta-Analysis]
Thomsen M (2025). [PMID: 40533913](https://pubmed.ncbi.nlm.nih.gov/40533913/). *Annals of clinical and translational neurology*. [Epidemiology / Natural History]
Mouraux C (2025). [PMID: 39887664](https://pubmed.ncbi.nlm.nih.gov/39887664/). *Movement disorders clinical practice*. [Gene Therapy / Novel Therapeutics]
Reinhold C (2025). [PMID: 39732371](https://pubmed.ncbi.nlm.nih.gov/39732371/). *Neurobiology of disease*. [Review / Meta-Analysis]
Wu R (2024). [PMID: 38845987](https://pubmed.ncbi.nlm.nih.gov/38845987/). *Heliyon*. [Basic Science / Preclinical]
Thomsen M (2024). [PMID: 39677454](https://pubmed.ncbi.nlm.nih.gov/39677454/). *medRxiv : the preprint server for health sciences*. [Basic Science / Preclinical]
Data assembled from 7 of 12 sources · Last updated Sep 19, 2026, 2:58 PM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center