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Start free with EleplanOromandibular dystonia
ORPHA:93958Disease
What it is
A form of focal dystonia, affecting the lower part of the face and jaws. It is characterized by sustained or repetitive involuntary jaw and tongue movements and facial grimacing caused by involuntary spasms of the masticatory, facial, pharyngeal, lingual, and lip muscles.
Key facts
- Age of onset
- Adolescent, Adult, Childhood, Elderly, Infancy
- Classified as
- Disease
Recorded for the broader condition
- Prevalence
- 1-5 / 10 000 (Serbia)Focal, segmental or multifocal dystonia
- Inheritance
- Autosomal dominantFocal, segmental or multifocal dystonia
Orphanet records these for the broader condition rather than for this specific form. They are a starting point, not a figure for this subtype — subtypes often differ, and some are defined by being rarer than the condition they sit under.
Signs and symptoms
Common30–79%
8Sometimes5–29%
10- Abnormality of the nose
- Abnormal lip morphology
- Blepharospasm
- Bruxism
- Facial grimacing
- Generalized dystonia
- Hyperkinetic movements
- Laryngeal dystonia
and 2 more in this range
These ranges are how often a sign appears across everyone diagnosed, not a prediction for one person — most people have some of these and not others. Orphanet also records findings that are specifically absent in this disease; those are in the data but not listed here.
ICD-10 codes
Related health topics
Reached through the ICD-10 categories this disease is filed under, so these describe the broader group rather than this disease specifically.
Cross-references
Orphadata Science: Free access data from Orphanet. © INSERM 1999. Data version 2026-06-23. Available under CC BY 4.0. This is a reference, not medical advice.
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