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Pseudodiastrophic dysplasia is characterized by rhizomelic shortening of the limbs and severe clubfoot deformity, in association with elbow and proximal interphalangeal joint dislocations, platyspondyly, and scoliosis. It has been described in about 10 patients. An autosomal recessive inheritance has been suggested. Pseudodiastrophic dysplasia differs from diastrophic dysplasia on the basis of clinical, radiographic, and histopathologic findings. Clubfoot can be treated by surgical therapy, and neonatal contractures and scoliosis can be relieved by physical therapy. Several of the reported patients died in the neonatal period or during infancy.
Features include: Severe short stature, Rhizomelia, Hypoplasia of the odontoid process, and Anteverted nares and 20 more.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Bones and joints | 3 | Excessive inward curve of the lower back (lumbar hyperlordosis), Sideways curvature of the spine (scoliosis), Tongue-like lumbar vertebral deformities |
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
Data assembled from 4 of 12 sources · Last updated Sep 20, 2026, 5:50 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Growth and development
2 |
Severe short stature, Failure to thrive |
Blood and immune system | 1 | Recurrent infections |
Metabolism | 1 | Fever |