An osteochondrodysplastic syndrome (OMIM:112310) characterised by dwarfism, short, bowed, rigid limbs, typical facies and defects in long bone and vertebral body ossification. It is lethal in the neonatal period.
It differs from atelosteogenesis as the mineralisation defects are more severe, with patchy absence of ossification in some bones. The name derives from the extreme bowing of the limbs which Kozlowski et al (1981) likened to a boomerang.
Molecular pathology Defects in FLNB, which encodes filamin B, cause boomerang dysplasia.