Encephalocoele
🧠 Encephalocele is a rare neural tube defect where sac-like protrusions of brain tissue and meninges extend through openings in the skull.
⚡ Early diagnosis and timely surgical repair are critical to reduce complications and improve neurological outcomes.
ℹ️ About
- Definition: Congenital defect where brain tissue, cerebrospinal fluid (CSF), and meninges herniate through a skull defect.
- Location: 📍 Most commonly occipital, but can also appear frontally or nasofrontal (near nose/forehead).
🧬 Aetiology
- Genetic & Environmental: 🌍 Multifactorial, due to disrupted neural tube closure during early development.
- Folic Acid Deficiency: 🍃 Linked with higher risk of neural tube defects if maternal folate intake is inadequate.
- Associated Disorders: 🤝 May co-occur with syndromes or chromosomal abnormalities.
🗂️ Types
- Meningocele: Containing only CSF + meninges.
- Encephalocele: CSF + meninges + brain tissue.
- Hydroencephalocele: Includes CSF, meninges, brain tissue, and part of ventricular system.
⚙️ Pathophysiology
- ❌ Failure of neural tube closure within the first 3–4 weeks of gestation.
- 🪨 Skull defect allows brain/meningeal herniation → compression or dysfunction of neural tissue.
🩺 Clinical Features
- Visible Sac: 🎒 Protrusion on scalp (often occipital), containing CSF ± brain tissue.
- Neurological Symptoms: ⚡ Seizures, hydrocephalus, developmental delay, motor deficits.
- Craniofacial Abnormalities: 😷 Midline facial anomalies or skull deformities.
🔎 Investigations
- Prenatal Ultrasound: 📡 Detectable in 2nd trimester.
- MRI: 🖥️ Defines brain tissue involvement and defect extent.
- Genetic Testing: 🧬 Consider if syndromic features present.
🛠️ Management
- Pre-birth Counselling: 👨👩👧 Discuss prognosis, surgical options, and outcomes with parents.
- Surgical Repair: ✂️ Reduction of herniated tissue + closure of skull defect; timing depends on size, site, and symptoms.
- Supportive Care: ❤️ Includes hydrocephalus shunting, physio/OT, and seizure control if needed.
📈 Prognosis
- Variable: Depends on site, size, and brain tissue involved.
- Better Outcome: ✅ Small meningoceles (CSF + meninges only) often fare well; larger encephaloceles with brain tissue → poorer neurological prognosis.
