If your child has been diagnosed with an atretic encephalocele, this is often the mildest end of the encephalocele spectrum. This article explains what it is and why, even so, imaging matters.
What "atretic" means
"Atretic" essentially means small and incompletely formed. An atretic encephalocele is a small lesion — often a nodule on the scalp, frequently in the parietal (top) or occipital (back) midline — that represents a small, largely "closed-off" remnant of the encephalocele process. It usually contains little or no functional brain tissue.
Why it's usually milder
Because atretic encephaloceles are small and typically contain minimal or no functional brain tissue, the developmental outlook is often good. In many cases, surgery is performed primarily to remove the lesion, confirm the diagnosis, and achieve a clean cosmetic result, rather than to address a large amount of herniated brain.
Why imaging is still important
"Small" doesn't mean "skip the workup." Atretic encephaloceles can occasionally be associated with underlying intracranial findings (such as abnormal venous structures beneath the lesion) or be a marker for other anomalies. So even a small scalp nodule that might be an atretic encephalocele warrants MRI before removal — both to plan the procedure safely and to check the brain beneath.
What to expect
For a typical isolated atretic encephalocele with reassuring imaging:
- Surgery is usually a relatively limited procedure to remove the lesion and close the defect.
- The cosmetic result is generally good.
- The developmental outlook is often favorable.
- Follow-up confirms healing and monitors development.
Sources
- StatPearls (NCBI Bookshelf) — Encephalocele (atretic)
- Child's Nervous System / peer-reviewed literature — atretic encephalocele
- Cleveland Clinic — Encephalocele
- CHOP — Encephalocele