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Cleidocranial Dysplasia definition: A rare autosomal dominant condition in which there is defective ossification of the cranial bones with large fontanels and delayed closing of the sutures, complete or partial absence of the clavicles, wide pubic symphysis, short middle phalanges of the fifth fingers, and dental and vertebral anomalies. (From Dorland, 27th ed)
Cleidocranial Dysplasia definition: A rare autosomal dominant disorder caused by mutations in the RUNX2 gene. It is characterized by developmental abnormalities in the bones and teeth, including the complete or partial absence of the clavicles, delayed closure of the fontanels, protruding mandible, hypertelorism, scoliosis, and short stature.
cleidocranial dysplasia (CCD, CLCD) definition: A congenital disorder of bone formation with clavicular hypoplasia or agenesis with a narrow thorax, allowing approximation the shoulders in front of the chest occurring with delayed ossification of the skull, excessively large fontanelles, and delayed closing of the sutures. The fontanelles may remain open until adulthood, but the sutures often close with interposition of wormian bones. Bosses of the frontal, parietal, and occipital regions give the skull a large globular shape with small face. The characteristic skull abnormalities are sometimes referred to as the "Arnold head" named after the descendants of a Chinese who settled in South Africa and changed his name to Arnold. More than 100 additional anomalies may be associated, including wide pubic symphysis, dental abnormalities, short middle phalanges of the fifth fingers, delayed skeletal maturation, hearing deficiency, and mild mental retardation in some cases.
 
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