Core Terms & Classification
Meningoencephalocele
A meningoencephalocele is a protrusion that contains brain tissue along with the meninges and usually cerebrospinal fluid.
In short: Meningoencephalocele
- The presence and amount of brain tissue is a key factor in the outlook.
- It is also called encephalomeningocele.
- It generally carries a more guarded outlook than a pure meningocele.
- Surgery aims to protect functional brain and remove only non-functional tissue.
What it is
A meningoencephalocele is an encephalocele sac that includes actual brain tissue, not just membranes and fluid. The amount and function of that tissue — and whether it is working brain or malformed, non-functional tissue — is central to both the surgical plan and the expected outcome.
Understanding Meningoencephalocele
During repair, surgeons aim to protect and return functional brain tissue while removing tissue that is malformed or non-functional, then close the area watertight. How much functional brain is involved is one of the strongest predictors of outcome, which is why imaging focuses closely on the sac's contents and on the rest of the brain. A meningoencephalocele is also more likely than a simple meningocele to be accompanied by associated findings such as hydrocephalus or cortical malformations.
Why it matters
Because brain tissue is involved, a meningoencephalocele requires especially careful imaging and planning, and the outlook is more individualized. Understanding this helps families see why the team weighs many factors — not just the diagnosis label — when discussing what to expect.
Common questions
Is brain tissue in the sac dangerous to remove?
Surgeons preserve functional tissue and remove only non-functional tissue, guided by imaging and assessment.
Does more brain tissue mean a worse outlook?
It can, but the outcome depends on multiple factors, not contents alone.
Is it the same as encephalomeningocele?
Yes — the two terms are interchangeable.
Bottom line
A meningoencephalocele contains brain tissue, making the amount and function of that tissue central to the surgical plan and the outlook.
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