Cleidocranial dysostosis

Alternative names:

cleidocranial dysplasia

Definition:

An inherited disorder of bony development characterized by absent or incompletely formed collar bones, characteristic facial appearance, and dental abnormalities.

Causes, incidence, and risk factors:

Cleidocranial dysostosis is inherited as an autosomal dominant characteristic. It is equally common in males and females. If one parent is affected, the child has a 50% probability of having the disease.

A heavy protruding brow, protruding jaw, wide nasal bridge, and abnormal malaligned teeth characterize the disorder. The incomplete development or absence of the collar bones allows the shoulders to be brought together in front of the body. Other bony abnormalities exist. Intelligence is normal.