Core Terms & Classification
Posterior encephalocele
A posterior encephalocele is located toward the back of the skull, most often occipital.
In short: Posterior encephalocele
- It is the more common pattern in Western countries.
- It generally carries a more guarded outlook than anterior types.
- It can be associated with Chiari III malformation and hydrocephalus.
- Earlier repair of some posterior encephaloceles can help prevent complications.
What it is
It is an encephalocele at the back of the head, most commonly through the occipital bone. It is the more frequent location in North America and Europe.
Understanding Posterior encephalocele
Posterior (especially occipital) encephaloceles may involve important structures at the back of the brain and are linked with associated findings such as hydrocephalus and, in the case of Chiari III malformation, displacement of hindbrain tissue. These associations are part of why posterior types generally carry a more guarded outlook than anterior ones, and why imaging closely examines the brain. Earlier repair of some posterior encephaloceles can help prevent complications, though timing is individualized.
Why it matters
Understanding the associations of posterior encephaloceles helps families grasp why the team looks beyond the sac itself — checking for hydrocephalus and hindbrain involvement — and why the outlook is considered more carefully than for many anterior types.
Common questions
Is a posterior encephalocele worse than anterior?
It generally carries a more guarded outlook, but outcome depends on many factors.
Where exactly is it?
At the back of the head, most often the occipital region.
What conditions are associated with it?
Hydrocephalus and, in some cases, Chiari III malformation.
Bottom line
Posterior encephaloceles occur at the back of the skull, are common in the West, and generally carry a more guarded outlook.
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