Types of
Hydrocephalus

Is caused by brain malformations or birth defects.
The most common cause of congenital hydrocephalus is obstruction of the cerebral aqueduct — the long, narrow passageway between the third and fourth ventricle or cavity of the brain. This condition may result from a blockage, infection, hemorrhage, tumor or arachnoid cyst, many of those were linked to lack of folic acid during pregnancy.

Communicating hydrocephalus
Occurs when the flow of cerebrospinal fluid (CSF) is blocked after it exits the ventricles.

Non-communicating hydrocephalus, also known as obstructive hydrocephalus, occurs when the flow of CSF is blocked along one of or more of the narrow passages connecting the ventricles.

Normally occurs as a result of an illness or injury, for example after a brain tumour, after a stroke or after a traumatic brain injury.

Communicating hydrocephalus
Occurs when the flow of cerebrospinal fluid (CSF) is blocked after it exits the ventricles.

Non-communicating hydrocephalus, also known as obstructive hydrocephalus, occurs when the flow of CSF is blocked along one of or more of the narrow passages connecting the ventricles.

Normal pressure hydrocephalus (NPH) sometimes called idiopathic normal pressure hydrocephalus (iNPH) is an accumulation of cerebrospinal fluid that causes the ventricles in the brain to become enlarged, sometimes with little or no increase in intracranial pressure (ICP).