Hydrocephalus is defined as an accumulation of cerebrospinal fluid within the ventricles of the brain, leading to increased intracranial pressure. Which option best reflects this definition?

Hydrocephalus is defined as an accumulation of cerebrospinal fluid within the ventricles of the brain, leading to increased intracranial pressure. Which option best reflects this definition?

• A. A condition characterized by an accumulation of cerebrospinal fluid within the ventricles of the brain, leading to increased intracranial pressure.
• B. Dilation of brain ventricles due to atrophy.
• C. Edema around the brain due to trauma.
• D. Degeneration of neurons in cortex.

Answer: (A)

Hydrocephalus is about CSF building up inside the brain’s ventricles and pushing the ICP higher. The best description is the one that states there is accumulation of cerebrospinal fluid within the ventricles leading to increased intracranial pressure. This captures the core idea: CSF excess within the ventricular system causing pressure rise. Understanding why this happens helps: CSF is produced and normally circulates, then is absorbed. When something blocks flow or absorption, CSF accumulates, enlarges the ventricles (ventriculomegaly), and raises intracranial pressure. Other scenarios describe different processes. Dilation of the ventricles due to brain atrophy (hydrocephalus ex vacuo) happens when brain tissue shrinks, so ventricles enlarge without the same pressure increase. Edema around the brain after trauma refers to swelling of brain tissue, not CSF buildup inside the ventricles. Degeneration of neurons in the cortex describes a neurodegenerative process rather than a CSF accumulation issue.

Hydrocephalus is about CSF building up inside the brain’s ventricles and pushing the ICP higher. The best description is the one that states there is accumulation of cerebrospinal fluid within the ventricles leading to increased intracranial pressure. This captures the core idea: CSF excess within the ventricular system causing pressure rise.

Understanding why this happens helps: CSF is produced and normally circulates, then is absorbed. When something blocks flow or absorption, CSF accumulates, enlarges the ventricles (ventriculomegaly), and raises intracranial pressure.

Other scenarios describe different processes. Dilation of the ventricles due to brain atrophy (hydrocephalus ex vacuo) happens when brain tissue shrinks, so ventricles enlarge without the same pressure increase. Edema around the brain after trauma refers to swelling of brain tissue, not CSF buildup inside the ventricles. Degeneration of neurons in the cortex describes a neurodegenerative process rather than a CSF accumulation issue.