Cleidocranial Dysplasia in Son and Father: Report of Two Rare Cases with Review of Literature

Cleidocranial dysplasia (CCD) is a rare autosomal dominant skeletal disease, which is caused by mutation in the gene on 6p21 encoding transcription factor CBFA1, i.e. runt-related transcription factor 2 (RUNX2). The disease is characterized by a persistently open anterior fontanelle and skull sutures, hypoplastic or aplastic clavicles, dental abnormalities, short stature, a wide pubic symphysis and a variety of other skeletal changes. A major finding of CCD is hypoplasia or aplasia of clavicular bones resulting in the ability of the patient to approximate the shoulders. Delayed closure of the anterior fontanelle and of metopic sutures causes frontal bossing. We report a rare case of CCD in a 15-year-old boy and in his father and emphasize the importance of clinical and radiographic findings in CCD.