Congenital hydrocephalus

Congenital hydrocephalus is mainly caused by malformations, and the common ones are: 1. Brain aqueduct malformations: see also ① aqueduct bifurcation deformities; ② aqueduct stenosis or atresia; ③ aqueduct diaphragms. 2. Cerebellar subtonsillar hernia deformity: It is due to the tonsils, medulla oblongata and the fourth ventricle hernia into the spinal canal, the fourth ventricle becomes narrow and long, and the median and lateral holes move downward, which hinders CSF circulation. This malformation can exist alone, but most are associated with spinal meningocele, or with skull base depression. 3. Congenital atresia of the median and lateral foramen of the fourth ventricle: Rare, need to be distinguished from secondary adhesions caused by intracranial infection. 4. A considerable part of congenital hydrocephalus can be caused by tumors in the posterior fossa of infants. 5. Other congenital diseases, such as cartilage hypoplasia, craniocervical junction deformity, spina bifida, nevus hamartomatosis, Dandy-Walker syndrome, corpus callosum, cerebellar malformation, etc., can be associated with cerebral effusion. water.