What condition develops due to inflammation of the arachnoid villi?

Hydrocephalus develops due to inflammation of the arachnoid villi, a condition that affects the normal absorption of cerebrospinal fluid (CSF). The arachnoid villi are small finger-like projections in the brain that allow CSF to flow into the bloodstream. When these structures become inflamed, their ability to absorb CSF is compromised, leading to an accumulation of fluid in the ventricles of the brain. This buildup of CSF increases intracranial pressure and can result in hydrocephalus, which is characterized by an enlarged head size, potential developmental delays, and other neurological impairments.

In contrast, meningitis involves inflammation of the protective membranes covering the brain and spinal cord, not specifically related to the function of the arachnoid villi. Subdural hematoma is a collection of blood outside the brain, typically due to trauma, and cerebral palsy is a group of disorders affecting movement and coordination, which can have various underlying causes but is not linked to inflammation of the arachnoid villi. Thus, hydrocephalus is directly related to the dysfunction of the arachnoid villi's CSF absorption capabilities due to inflammation.