[Polymorphism of the cleidocranial dysplasia syndrome. Presentation of 2 cases].

Following a brief description of the clinical and radiological features of cleidocranial dysplasia (see Table), two patients are presented who respectively exemplify the classic and the incomplete form of this syndrome. The morphologic appearance of the bone segments involved may suggest a diagnosis of cleidocranial dysplasia even through occasional radiologic examinations, specially in the pediatric age. The patients suffering from this condition, which in itself is not incapacitating, should be serially observed so that appropriate therapeutic measures can be adopted, mainly in the presence of hip dysplasia or when the thoracic cage or the spine are severely involved.