DISEASES Nervous System Diseases [C10] Nervous System Diseases Nervous System Malformations [C10.500] Nervous System Malformations Agenesis of Corpus Callosum [C10.500.034] Agenesis of Corpus Callosum Central Nervous System Cysts [C10.500.142] Central Nervous System Cysts Central Nervous System Vascular Malformations [C10.500.190] Central Nervous System Vascular Malformations Congenital Cranial Dysinnervation Disorders [C10.500.198] Congenital Cranial Dysinnervation Disorders Dandy-Walker Syndrome [C10.500.205] Dandy-Walker Syndrome Hereditary Sensory and Autonomic Neuropathies [C10.500.250] Hereditary Sensory and Autonomic Neuropathies Hereditary Sensory and Motor Neuropathy [C10.500.300] Hereditary Sensory and Motor Neuropathy Hydranencephaly [C10.500.450] Hydranencephaly Malformations of Cortical Development [C10.500.507] Malformations of Cortical Development Neural Tube Defects [C10.500.680] Neural Tube Defects Anencephaly [C10.500.680.196] Anencephaly Arnold-Chiari Malformation [C10.500.680.291] Arnold-Chiari Malformation Encephalocele [C10.500.680.488] Encephalocele Meningocele [C10.500.680.598] Meningocele Meningomyelocele [C10.500.680.610] Meningomyelocele Pentalogy of Cantrell [C10.500.680.705] Pentalogy of Cantrell Spinal Dysraphism [C10.500.680.800] Spinal Dysraphism Optic Nerve Hypoplasia [C10.500.760] Optic Nerve Hypoplasia DISEASES Congenital, Hereditary, and Neonatal Diseases and Abnormalities [C16] Congenital, Hereditary, and Neonatal Diseases and Abnormalities Congenital Abnormalities [C16.131] Congenital Abnormalities Nervous System Malformations [C16.131.666] Nervous System Malformations Agenesis of Corpus Callosum [C16.131.666.034] Agenesis of Corpus Callosum Central Nervous System Cysts [C16.131.666.142] Central Nervous System Cysts Central Nervous System Vascular Malformations [C16.131.666.190] Central Nervous System Vascular Malformations Congenital Cranial Dysinnervation Disorders [C16.131.666.198] Congenital Cranial Dysinnervation Disorders Dandy-Walker Syndrome [C16.131.666.205] Dandy-Walker Syndrome Hereditary Sensory and Motor Neuropathy [C16.131.666.300] Hereditary Sensory and Motor Neuropathy Hereditary Sensory and Autonomic Neuropathies [C16.131.666.310] Hereditary Sensory and Autonomic Neuropathies Hydranencephaly [C16.131.666.450] Hydranencephaly Malformations of Cortical Development [C16.131.666.507] Malformations of Cortical Development Neural Tube Defects [C16.131.666.680] Neural Tube Defects Anencephaly [C16.131.666.680.196] Anencephaly Arnold-Chiari Malformation [C16.131.666.680.291] Arnold-Chiari Malformation Encephalocele [C16.131.666.680.488] Encephalocele Meningocele [C16.131.666.680.598] Meningocele Meningomyelocele [C16.131.666.680.610] Meningomyelocele Pentalogy of Cantrell [C16.131.666.680.705] Pentalogy of Cantrell Spinal Dysraphism [C16.131.666.680.800] Spinal Dysraphism Optic Nerve Hypoplasia [C16.131.666.763] Optic Nerve Hypoplasia

Neural Tube Defects - Preferred

Concept UI	M0014686
Scope note	Congenital malformations of the central nervous system and adjacent structures related to defective neural tube closure during the first trimester of pregnancy generally occurring between days 18-29 of gestation. Ectodermal and mesodermal malformations (mainly involving the skull and vertebrae) may occur as a result of defects of neural tube closure. (From Joynt, Clinical Neurology, 1992, Ch55, pp31-41)
Preferred term	Neural Tube Defects
Entry term(s)	Defect, Neural Tube Defects, Neural Tube Developmental Defects, Neural Tube Developmental Neural Tube Defects Neural Tube Defect Neural Tube Developmental Defects

Craniorachischisis - Narrower

Concept UI	M0336865
Preferred term	Craniorachischisis
Entry term(s)	Craniorachischises

Diastematomyelia - Narrower

Concept UI	M0024643
Preferred term	Diastematomyelia
Entry term(s)	Diastematomyelias

Tethered Cord Syndrome - Narrower

Concept UI	M0024646
Preferred term	Tethered Cord Syndrome
Entry term(s)	Dysraphism, Occult Spinal Dysraphisms, Occult Spinal Occult Spinal Dysraphism Occult Spinal Dysraphism Sequence Occult Spinal Dysraphisms Spinal Dysraphism, Occult Spinal Dysraphisms, Occult Tethered Cord Syndromes Tethered Spinal Cord Syndrome

Iniencephaly - Narrower

Concept UI	M0336869
Preferred term	Iniencephaly
Entry term(s)	Iniencephalies

Neurenteric Cyst - Narrower

Concept UI	M0338010
Preferred term	Neurenteric Cyst
Entry term(s)	Cyst, Neurenteric Cyst, Neuroenteric Cysts, Neurenteric Cysts, Neuroenteric Neurenteric Cysts Neuroenteric Cyst Neuroenteric Cysts

Spinal Cord Myelodysplasia - Narrower

Concept UI	M0336867
Preferred term	Spinal Cord Myelodysplasia
Entry term(s)	Myelodysplasia, Spinal Cord Myelodysplasias, Spinal Cord Spinal Cord Myelodysplasias

Acrania - Narrower

Concept UI	M0336868
Preferred term	Acrania
Entry term(s)	Acranias

Exencephaly - Narrower

Concept UI	M0336866
Preferred term	Exencephaly
Entry term(s)	Exencephalies