Core Terms & Classification
Atretic encephalocele
An atretic encephalocele is a small, often flat or nodular form made of a tiny remnant of meninges and tissue.
In short: Atretic encephalocele
- It is usually the mildest type of encephalocele.
- It most often occurs at the back (occipital) or top (parietal) of the head.
- It is still evaluated with imaging, because appearance can be misleading.
- Many are repaired mainly for protection and appearance.
What it is
"Atretic" refers to an incompletely formed, small remnant lesion. An atretic encephalocele consists of a small amount of meningeal and other tissue rather than a large sac with significant contents.
Understanding Atretic encephalocele
Although small and often mild, an atretic encephalocele is still assessed by imaging to check for any connection to intracranial structures and for associated findings, because a small surface lesion can occasionally signal something deeper. Many atretic encephaloceles are repaired primarily for protection and appearance rather than because of large protruding contents.
Why it matters
Recognizing that an atretic encephalocele is usually mild can be reassuring, but the emphasis on imaging reflects an important principle: even small lesions are evaluated thoroughly before conclusions are drawn. This protects against missing an associated finding.
Common questions
Is an atretic encephalocele serious?
It is usually the mildest form, but imaging still guides care.
Does it need surgery?
Often yes, frequently for protection and appearance.
Why image a small lesion?
To check for any deeper connection or associated findings.
Bottom line
An atretic encephalocele is a small, usually mild remnant lesion that is still evaluated with imaging and often repaired.
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Read the Encephalocele patient guides
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