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Hypertelorism: interorbital growth, measurements, and pathogenetic considerations
M M Cohen1, A Richieri-Costa, M L Guion-Almeida
1Division of Oral and Maxillofacial Pathology, Faculty of Dentistry, Dalhousie University, Halifax, Nova Scotia, Canada.
International Journal of Oral and Maxillofacial Surgery
|December 1, 1995
Summary
Hypertelorism, characterized by increased interorbital distance, has various causes and measurement methods. Understanding its pathogenesis and associated conditions is crucial for diagnosis and research.
Area of Science:
- Craniofacial anatomy
- Developmental biology
- Medical imaging
Background:
- Interorbital distance changes normally during pre- and post-natal development.
- Hypertelorism is an increased distance between the eyes, often associated with various congenital conditions.
- Illusory hypertelorism can result from specific facial features and ocular conditions.
Purpose of the Study:
- To describe normal interorbital distance changes.
- To review causes and measurement techniques for hypertelorism.
- To explore pathogenetic mechanisms and associated conditions of hypertelorism.
Main Methods:
- Review of normal developmental changes in interorbital distance.
- Evaluation of soft tissue and bone measurements for hypertelorism.
- Analysis of proposed indices for hypertelorism measurement.
- Discussion of pathogenetic mechanisms and associated anomalies.
- Consideration of experimental animal models.
Main Results:
- Identified causes of illusory hypertelorism including flat nasal bridge and epicanthic folds.
- Discussed various measurement techniques and proposed indices for hypertelorism.
- Explored potential pathogenetic mechanisms such as early sphenoid ossification and cranial base disturbances.
- Highlighted associations with orofacial clefting and other anomalies.
- Reviewed experimental models.
Conclusions:
- Hypertelorism has diverse etiologies, ranging from developmental anomalies to specific facial features.
- Accurate measurement and understanding of pathogenetic mechanisms are vital for clinical assessment.
- Further research, including experimental models, can elucidate hypertelorism development and associations.