An early-onset distal osteolysis characterised by severe resorption of the hands and feet and absence of the distal and middle phalanges. It has been described in a son and daughter born to consanguineous parents. Other manifestations include distal muscular hypertrophy, flexion contractures, short stature, mild intellectual deficit and characteristic facies (maxillary hypoplasia, exophthalmos, and a broad nasal tip). It is transmitted as an autosomal recessive trait.

Abnormally small dimension of the Maxilla. Usually creating a malocclusion or malalignment between the upper and lower teeth or resulting in a deficient amount of projection of the base of the nose and lower midface region.