1. NEURAL TUBE DEFECTS – CORE ASSESSMENT
๐ Intact Cranial Vault
๐ Intact Vertebral Arches
๐ Normal Skin Coverage over Spine
๐ Normal Craniospinal Alignment
2. CRANIAL NEURAL TUBE DEFECTS
๐ Anencephaly
๐ Acrania
๐ Exencephaly
๐ Encephalocele (Occipital / Parietal / Frontal)
๐ Cranial Meningocele
3. SPINAL NEURAL TUBE DEFECTS
๐ Open Spina Bifida
๐ Closed Spina Bifida
๐ Myelomeningocele
๐ Meningocele
๐ Myeloschisis
๐ Sacral / Lumbar / Thoracic / Cervical Level Defect
4. INDIRECT CRANIAL SIGNS (SPINA BIFIDA)
๐ Lemon Sign (Frontal Bone Scalloping)
๐ Banana Sign (Cerebellar Shape Abnormality)
๐ Obliterated Cisterna Magna
๐ Ventriculomegaly
๐ Small Posterior Fossa
5. FIRST-TRIMESTER MARKERS
๐ Absent Cranial Vault (11–13+6 Weeks)
๐ Irregular Brain Tissue Exposure
๐ Abnormal Brainstem-to-Occipital Bone Ratio
๐ Intracranial Translucency Absent
6. ASSOCIATED CNS ABNORMALITIES
๐ Arnold–Chiari II Malformation
๐ Hydrocephalus
๐ Agenesis of Corpus Callosum
๐ Posterior Fossa Abnormalities
7. ASSOCIATED SYSTEMIC FINDINGS
๐ Lower Limb Deformities
๐ Clubfoot (Talipes)
๐ Neurogenic Bladder
๐ Polyhydramnios
8. ETIOLOGICAL & RISK FACTORS
๐ Folic Acid Deficiency
๐ Maternal Diabetes Mellitus
๐ Antiepileptic Drug Exposure
๐ Genetic Predisposition
๐ Hyperthermia in Early Pregnancy
9. PROGNOSTIC & COUNSELING POINTS
๐ Level of Lesion Determines Neurological Outcome
๐ Open vs Closed Defect Prognosis
๐ Associated Chromosomal / Structural Anomalies
๐ Eligibility for Prenatal or Postnatal Surgical Repair
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