 Q04 |
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Other congenital malformations of brain |
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 Q04.0 |
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Congenital malformations of corpus callosum |
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| Agenesis of corpus callosum |
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| Q04.1 |
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Arhinencephaly |
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| Q04.2 |
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Holoprosencephaly |
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| Q04.3 |
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Other reduction deformities of brain |
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| Absence of part of brain | | Agenesis of part of brain | | Agyria | | Aplasia of part of brain | | Hydranencephaly | | Hypoplasia of part of brain | | Lissencephaly | | Microgyria | | Pachygyria |
| Excludes1 |
congenital malformations of corpus callosum (Q04.0)
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| Q04.4 |
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Septo-optic dysplasia of brain |
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| Q04.5 |
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Megalencephaly |
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| Q04.6 |
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Congenital cerebral cysts |
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| Porencephaly | | Schizencephaly |
| Excludes1 |
acquired porencephalic cyst (G93.0)
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| Q04.8 |
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Other specified congenital malformations of brain |
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| Arnold-Chiari syndrome, type IV | | Macrogyria |
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| Q04.9 |
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Congenital malformation of brain, unspecified |
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| Congenital anomaly NOS of brain | | Congenital deformity NOS of brain | | Congenital disease or lesion NOS of brain | | Multiple anomalies NOS of brain, congenital |
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