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Start free with EleplanPrimary condylar hyperplasia
ORPHA:477781Disease
Also called Type 1 condylar hyperplasia
What it is
A rare temporomandibular joint anomaly characterized by progressive, asymmetrical, non-neoplastic overgrowth of a mandibular condyle. It is unilateral in most cases and leads to progressive facial asymmetry, mandibular deviation, articular dysfunction, and dental malocclusion.
Key facts
- Age of onset
- All ages
- Inheritance
- Not applicable
- Classified as
- Disease
Signs and symptoms
Common30–79%
4These 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
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.
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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