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A tyrosine hydroxylase deficiency with onset typically between age three and 12 months. Motor milestones are overtly delayed in this severe form. Affected infants demonstrate truncal hypotonia and parkinsonian symptoms and signs (hypokinesia, rigidity of extremities, and/or tremor).
No clinical trials have been registered for TH-deficient infantile parkinsonism and motor delay.
5 publications have been identified in PubMed for TH-deficient infantile parkinsonism and motor delay. Research spans Review / Meta-Analysis (80%) and Epidemiology / Natural History (20%).
Casazza K (2026). [PMID: 41500845](https://pubmed.ncbi.nlm.nih.gov/41500845/). *J Inherit Metab Dis*. [Review / Meta-Analysis]
Wilpert NM (2025). [PMID: 40088079](https://pubmed.ncbi.nlm.nih.gov/40088079/). *Mov Disord*. [Epidemiology / Natural History]
Asbreuk MABC (2025). [PMID: 40577679](https://pubmed.ncbi.nlm.nih.gov/40577679/). *Neurology*. [Review / Meta-Analysis]
Zhang Y (2025). [PMID: 39925015](https://pubmed.ncbi.nlm.nih.gov/39925015/). *CNS Neurosci Ther*. [Review / Meta-Analysis]
Lopez-Urias CU (2025). [PMID: 40437309](https://pubmed.ncbi.nlm.nih.gov/40437309/). *Neurol Sci*. [Review / Meta-Analysis]
Data assembled from 2 of 12 sources · Last updated Sep 20, 2026, 8:44 AM UTC
Common questions about TH-deficient infantile parkinsonism and motor delay