1-Is characterized by a single ventricle.
2-Has three types:
-Alobar holoprosencephaly:
This condition characterized by the followings
*Mono-ventricle.
*No mid line structures including falx.
*Fused thalami.
*Remained brain tissue particularly seen in the supra tentorial area anteriorly.
-Semi lobar holoprosencephaly:
*Here you can see part of falx and other mid structures.
- absence of septum pellucidum
- monoventricle with partially developed occipital and temporal horns (horse shoe ventricle).
- rudimentary falx cerebri : absent anteriorly
- incompletely formed interhemispheric fissure
- partial or complete fusion of the thalami
- absent olfactory tracts and bulbs
- agenesis or hypoplasia of the corpus callosum
- incomplete hippocampal formation
-Lobar holoprosencephaly.
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| Holoprosencephaly |
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