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Start free with EleplanPrimary progressive apraxia of speech
ORPHA:314566Disease
Also called PPAOS
What it is
Primary progressive apraxia of speech is a rare neurodegenerative disease characterized by impaired planning or programming of the movements for speech, leading to phonetically and prosodically abnormal speech, in absence, at onset, of any other neurological features (such as aphasia, memory loss, pyramidal signs). Patients usually present articulatory distortions/groping, slow rate, distorted sound substitutions and/or trial and error articulatory movements which begin insiduously and worsen over time.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Adult
- Inheritance
- Unknown
- Classified as
- Disease
Prevalence figures describe populations, not individuals, and are often estimates from a single study. Where the figure is an incidence or a birth prevalence, it says so.
ICD-10 codes
ICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. A shared code identifies the group, not this disease — the ORPHAcode above is what identifies it.
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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