An extremely rare primary bone dysplasia disorder characterized by a bell-shaped thorax, disproportionate short stature, pelvic hypoplasia, dislocatable radial heads and elongated distal fibulae. Acetabular spurs and phalangeal cone-shaped epiphyses are not present and osseous manifestations tend to normalize with age. There have been no further descriptions in the literature since 1988. [from SNOMEDCT_US]