Which are the causes of Hydrocephalus?

Hydrocephalus is a medical condition characterized by the accumulation of cerebrospinal fluid (CSF) within the brain, leading to an increase in intracranial pressure. This condition can occur in individuals of all ages, from infants to older adults. While the exact cause of hydrocephalus is not always known, there are several factors that can contribute to its development.

1. Congenital Causes

Congenital hydrocephalus refers to cases where the condition is present at birth. It can be caused by various factors, including:

• Genetic abnormalities: Certain genetic disorders, such as Dandy-Walker syndrome or X-linked hydrocephalus, can lead to the development of hydrocephalus.


• Developmental abnormalities: Structural malformations in the brain or spinal cord during fetal development can obstruct the normal flow of CSF, resulting in hydrocephalus.


• Infections during pregnancy: Infections like rubella, cytomegalovirus, or toxoplasmosis contracted by the mother during pregnancy can increase the risk of hydrocephalus in the developing fetus.

2. Acquired Causes

Acquired hydrocephalus can develop after birth due to various factors, including:

• Infections: Certain infections, such as meningitis or encephalitis, can cause inflammation and blockage of the pathways through which CSF flows, leading to hydrocephalus.


• Tumors: Brain tumors can obstruct the normal flow of CSF, resulting in hydrocephalus. Both benign and malignant tumors can contribute to the development of this condition.


• Head trauma: Severe head injuries or trauma can cause bleeding or swelling in the brain, leading to hydrocephalus.


• Brain hemorrhage: Bleeding within the brain, often caused by ruptured blood vessels or aneurysms, can disrupt the normal circulation of CSF and contribute to hydrocephalus.


• Stroke: A stroke can cause damage to the brain tissue and disrupt the flow of CSF, leading to hydrocephalus.

3. Idiopathic Causes

In some cases, the cause of hydrocephalus remains unknown, and it is referred to as idiopathic hydrocephalus. This means that despite thorough medical evaluation, no specific cause can be identified.

4. Other Contributing Factors

While not direct causes of hydrocephalus, certain factors can contribute to its development or exacerbate existing conditions. These include:

• Age: Hydrocephalus can occur at any age, but it is more commonly observed in infants and older adults.


• Family history: Having a family history of hydrocephalus or certain genetic disorders can increase the risk of developing the condition.


• Medical conditions: Certain medical conditions, such as spina bifida, Chiari malformation, or aqueductal stenosis, can predispose individuals to hydrocephalus.

It is important to note that the causes of hydrocephalus can vary from person to person, and in many cases, the exact cause may not be fully understood. Proper diagnosis, medical evaluation, and treatment are crucial in managing hydrocephalus and minimizing its potential complications.