Crouzon Syndrome

Reference work entry

In 1912, Crouzon described the hereditary syndrome of craniofacial dysostosis in a mother and son. He described the triad of calvarial deformities, facial anomalies, and exophthalmos. Crouzon syndrome is characterized by premature closure of calvarial and cranial base sutures as well as those of the orbit and maxillary complex (craniosynostosis). Other clinical features include hypertelorism, exophthalmos, strabismus, beaked nose, short upper lip, hypoplastic maxilla, and relative mandibular prognathism. Prevalence is 1 per 60,000 (approximately 16.5 per 1,000,000) live births (Cohen and Kreiborg 1992). Crouzon syndrome makes up approximately 4.8% of all cases of craniosynostosis.

Synonyms and Related Disorders

Craniofacial dysostosis type I; Crouzon craniofacial dysostosis

Genetics/Basic Defects

  1. 1.
    1. a.
      An autosomal dominant disorder with
      1. i.

        Complete penetrance

      2. ii.

        Variable expressivity

    2. b.

      Sporadic in 50% of patients resulting from new mutations

  2. 2.
    1. a.



Radial Head Preimplantation Genetic Diagnosis Acanthosis Nigricans Choanal Atresia Continuous Positive Airway Pressure Device 
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