Intraorbital hypertelorism

Orbital hypertelorism is not a syndrome, but a physical finding in many craniofacial anomalies. It is defined as an increase in the bony interorbital distance. The ethmoid sinuses are normally over-expanded and in some cases of severe hypertelorism, there is an inferior displacement of the cribriform plate.

Etiology
It is both etiologically and pathogenetically heterogenous and can be found in patients with:

• Frontonasal Malformation
• Craniofrontonasal Dysplasia
• Median and Paramedian Craniofacial Clefts
• Craniosynostosis