To see Images first. Achondroplasia is the commonest disproportionate dwarfism. It is inherited as an autosomal dominent. The main feature is a symmetrical proximal limb shortening, rhizomelia, the humeri and femora are particularly affected.
Metaphyseal irregularity takes the form of cupping or a 'V' shaped metaphyseal notch.
Neurological bladder and hydrocephalus may complicate the axial stenoses. Various anatomic expressions of pathology.