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Congenital and Neonatal Disease - Pathology (view source)

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===[[Spina Bifida]]===

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===Hydrocephalus===

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===[[Hydrocephalus]]===

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* Not uncommon in dogsand cats.

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* Abnormal drainage of cerebrospinal fluid (CSF) results in dilation of the ventricles of the brain.

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** Is a result of either stenosis of:

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*** The aqueduct between the 3rd and 4th ventricle, or

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*** The foramina further back in the brain stem.

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** May also be acquired as a result of compression by tumours or infectious processes.

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* Dilation of the ventricles with CSF causes pressure atrophy of the overlying brain tissue.

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* Hydrocephalus can be seen at birth.

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** Characterised by a dome shaped skull and open fontanelles.

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* Hydrocephalus may also be hidden and detected later in life.

===Cerebellar Hypoplasia===

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