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X-linked dystonia-parkinsonism
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Condition

X-linked dystonia-parkinsonism

X-linked dystonia-parkinsonism is a progressive movement disorder found exclusively in people of Filipino descent, primarily affecting men with a combination of parkinsonism and involuntary muscle contractions.

Overview & Symptoms

X-linked dystonia-parkinsonism is a movement disorder that has been found only in people of Filipino descent. This condition affects men much more often than women.

Parkinsonism is usually the first sign of X-linked dystonia-parkinsonism. Parkinsonism is a group of movement abnormalities that include:

  • Tremors
  • Unusually slow movement (bradykinesia)
  • Rigidity
  • An inability to hold the body upright and balanced (postural instability)
  • A shuffling gait that can cause recurrent falls

Later in life, many affected individuals also develop a pattern of involuntary, sustained muscle contractions known as dystonia. The dystonia associated with X-linked dystonia-parkinsonism typically starts in one area, most often the eyes, jaw, or neck, and later spreads to other parts of the body. The continuous muscle cramping and spasms can be disabling. Depending on which muscles are affected, widespread (generalized) dystonia can cause

Frequently Asked Questions

nticholinergics (trihexyphenidyl) and muscle‑relaxing agents (baclofen) can modestly reduce focal dystonia, but many patients become refractory. Botulinum toxin injections are useful for isolated cranial dystonia. For generalized, severe cases, bilateral globus pallidus internus deep‑brain stimulation has shown significant improvement in both dystonia and parkinsonism, though surgical candidacy must be evaluated individually.
fter the initial parkinsonian phase (≈5–10 years), dystonia often spreads, leading to marked functional decline over the next decade. When gait becomes unsafe or falls are frequent, a cane or walker should be introduced. As upper‑limb dystonia progresses, adaptive utensils and wheelchair use may be needed. Early referral to a multidisciplinary movement‑disorder clinic helps plan timely interventions.
The first sign is usually a very slow, shuffling gait with early postural instability, but the hallmark is the later emergence of focal dystonia—often starting in the eyelid (blepharospasm), jaw, or neck—within a few years. In classic Parkinson disease, dystonia is less common and usually appears after long‑standing levodopa therapy.
Testing for the pathogenic mutation in the TAF1 gene on the X chromosome is recommended for at‑risk relatives. Male carriers will develop the disease; female carriers are usually asymptomatic but can transmit the mutation to 50 % of offspring. Genetic counseling clarifies these risks and discusses options such as carrier testing, prenatal diagnosis, or pre‑implantation genetic testing for families planning children.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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