The underlying genetics are uncertain.
Craniodiaphyseal dysplasia
Metaphyseal dysplasia
Craniometaphyseal dysplasia
Otospondylomegaepiphyseal dysplasia
Spondyloepimetaphyseal dysplasia
Spondylo-meta-epiphyseal dysplasia
Achondroplasia
Spondyloperipheral dysplasia