Random brain anatomy and disorders

Question 1

what is noncommunicating hydrocephalus?

Answer 1

obstruction is within the ventricular system (tumor in the region of the cerebral aqueduct

Question 2

what is a communicating hydrocephalus?

Answer 2

obstruction is within the subarachnoid space or arachnoid villi

Question 3

what is hydrocephalus ex vacuo

Answer 3

the ventriculomegaly that results from a loss of brain tissue (brain atrophy)

Question 4

what are common causes of hydrocepahlus?

Answer 4

Aqueductal stenosis — may result from a congenitally malformed cerebral aqueduct or from an acquired stenosis
• Congenital malformations
• Post-inflammatory hydrocephalus or post-hemorrhagic hydrocephalus — may be of the communicating type (obstruction in the subarachnoid space or arachnoid villi) or of the noncommunicating type (obstruction within the ventricular system, typically at the cerebral aqueduct)
• Tumors—may obstruct flow of CSF within ventricular system or within the subarachnoid space

Question 5

what can cause increased ICP?

Answer 5

mass lesions

hydrocephalus

diffuse brain edema

obstruction

idiopathic intracranial hypertension (pseudotumor cerebri)