CCD (cleidocranial dysostosis): A genetic (inherited) disorder of bone development characterized by:
The disorder is transmitted in an autosomal dominant manner. A parent with the condition has a 50:50 chance that each of their children will have the condition. Boys and girls stand an equal chance of being affected. The gene for the condition has been found on chromosome 6 (specifically, in band p21). The gene is for the transcription factor CBFA1 (core-binding factor alpha subunit 1). Mutations of CBFA1 cause this disorder.
A possible example of this disorder has been found in the skull of a Neanderthal man.