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A unique case of holoprosencephaly
A E Potters1, J M Schierbeek, W Jansen
1Department of Obstetrics and Gynaecology, Deventer Hospital, The Netherlands.
Prenatal Diagnosis
|October 1, 1996
Summary
Holoprosencephaly is a spectrum of craniofacial development disorders. This report details an extreme case with agenesis of the eyes and orbits, surpassing typical cyclopia.
Area of Science:
- Developmental Biology
- Teratology
- Clinical Genetics
Background:
- Holoprosencephaly (HPE) represents a spectrum of congenital anomalies characterized by incomplete separation of the forebrain.
- Cyclopia, a severe form of HPE, involves fusion of the orbits and is considered one of its most extreme presentations.
- Understanding the phenotypic variability in HPE is crucial for diagnosis and genetic counseling.
Observation:
- This study reports an exceptionally severe case of holoprosencephaly.
- The observed case exhibits agenesis (complete absence) of the eyes and orbits.
- This presentation is considered more extreme than previously described instances of cyclopia.
Findings:
- The case demonstrates a novel and extreme manifestation of craniofacial dysmorphia within the holoprosencephaly spectrum.
- Agenesis of ocular structures and orbits represents a significant deviation from typical cyclopia.
- This finding expands the known phenotypic range of holoprosencephalic malformations.
Implications:
- This case highlights the extreme end of the holoprosencephaly spectrum, challenging current classifications.
- Further research into the genetic and molecular underpinnings of such severe phenotypes is warranted.
- Such extreme cases inform our understanding of early brain and facial development pathways.