Meningocele and Myelomeningocele Surgery: Procedure, Preparation, and Recovery

Meningocele and myelomeningocele are congenital neural tube defects (spina bifida) requiring surgical repair, typically within the first 24–72 hours of life to minimize infection risk and preserve neurological function. While the defects differ—meningocele involves a CSF-filled sac without neural elements, while myelomeningocele includes exposed spinal cord and nerve roots—the surgical principles share a common framework.

1. Preoperative Preparation

• Comprehensive clinical assessment: neurologic baseline, associated anomalies (Chiari II, hydrocephalus, cardiac, renal), and nutritional status.
• Imaging: MRI brain/spine, cranial ultrasound for hydrocephalus.
• Antibiotic prophylaxis (typically ampicillin + gentamicin or cefotaxime).
• General anesthesia with careful airway management (often difficult due to Arnold-Chiari).
• Prone positioning with chest/pelvic rolls to avoid abdominal compression.

2. Incision and Exposure

A midline vertical incision is made over the defect, extending sufficiently for exposure. Skin, subcutaneous tissue, and fascia are carefully dissected. In myelomeningocele, the neural placode and nerve roots are identified and protected throughout.

3. Defect-Specific Repair

Meningocele

• The CSF-filled sac is dissected free from surrounding tissues.
• The sac is opened; any neural elements (rare) are inspected.
• The sac is excised or marsupialized; the dural defect is closed primarily or with a patch (duragen, pericardium, fascia).

Myelomeningocele

• The neural placode is gently released from the sac and surrounding adhesions.
• Nerve roots are carefully freed and positioned within the spinal canal.
• The dura is closed over the cord (primary or with graft) to recreate the subarachnoid space.
• Watertight closure is critical to prevent CSF leak.

4. Multilayer Closure

Fascia, subcutaneous tissue, and skin are closed in layers. Relaxation incisions or local flaps may be needed for large defects. Sterile dressings are applied.

5. Postoperative Care

• ICU/NICU monitoring: vital signs, neurologic checks (movement, sensation, rectal tone), wound assessment.
• CSF leak vigilance: clear drainage, bulging fontanelle, positional headache.
• Hydrocephalus management: ~80% of myelomeningocele patients require VP shunt placement (often delayed 1–2 weeks).
• Pain management, temperature regulation, infection prevention.
• Early involvement of multidisciplinary spina bifida team: neurosurgery, urology, orthopedics, PT/OT, social work.

Long-Term Outlook

Outcomes depend on lesion level, associated anomalies, and quality of ongoing care. Lifelong multidisciplinary follow-up is essential for optimizing mobility, bladder/bowel function, cognitive development, and independence.