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ORPHA:1803Disease
Also called Rivera-Perez-Salas syndrome · Thoracolimb dysplasia, Rivera type
What it is
A rare primary bone dysplasia disorder characterized by a bell-shaped thorax, disproportionate short stature, pelvic hypoplasia, dislocatable radial heads and elongated distal fibulae. No acetabular spurs nor phalangeal cone-shaped epiphyses are present and osseous manifestations tend to normalize with age. There have been no further descriptions in the literature since 1988.
Key facts
- Prevalence
- <1 / 1 000 000
- Age of onset
- Infancy
- 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.
Signs and symptoms
Very common80–99%
16- Abnormal fibula morphology
- Abnormality of pelvic girdle bone morphology
- Abnormal metaphysis morphology
- Bell-shaped thorax
- Diaphyseal thickening
- Disproportionate short-limb short stature
- Elbow dislocation
- Flat face
- Genu valgum
- Hyperlordosis
- Joint hypermobility
- Limb undergrowth
- Low posterior hairline
- Narrow chest
- Round face
- Short ribs
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
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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