Meningocele

What it is

A meningocele is a type of spina bifida present at birth, in which a small gap in the back of the spine lets a sac of the protective membranes and spinal fluid push outward, forming a fluid-filled pouch under the skin. Importantly, in a true meningocele the spinal cord and nerves stay in their normal place and are not in the sac — which is what sets it apart from the more involved myelomeningocele.

What it means

Because the nerves are usually not part of the sac, children with a meningocele often have little or no nerve injury, and many have normal or near-normal movement and sensation. Each child is different, so part of early care is a careful check of how the legs, bladder, and bowel are working, and watching development over time.

How it is evaluated

Imaging — ultrasound, and usually an MRI — shows exactly what is in the sac and confirms that the cord and nerves are where they should be. This is what distinguishes a meningocele from other forms of spina bifida and shapes the plan.

How it is treated

The usual treatment is a surgery to close the defect and protect the membranes, typically in infancy. After repair, most children do well, and care shifts to routine monitoring of growth and development, with attention to the spine and to occasional issues like a tethered (anchored) spinal cord that can show up as a child grows. The outlook is generally favorable.

The science — for the curious

The single most reassuring fact about a meningocele is what is not in the sac: with the spinal cord and nerves in their normal position, the nerve consequences are usually far milder than in myelomeningocele, where neural tissue is involved. That distinction — confirmed on imaging — is why two conditions that share the term “spina bifida” can have very different outlooks, and why getting the diagnosis precise matters so much.

Learn more

Centers for Disease Control and Prevention — About Spina Bifida: cdc.gov

MedlinePlus Genetics — Spina Bifida: medlineplus.gov

This handout is general education about a common condition and does not replace the personalized advice we discuss in clinic. If anything here does not match what we talked about, what we talked about wins — please ask me.