Which statement accurately describes vasogenic edema?

Which statement accurately describes vasogenic edema?

• A. Vasogenic edema is characterized by leakage of large molecules from capillaries into extracellular space.
• B. Vasogenic edema is caused by hydrocephalus.
• C. Vasogenic edema is primarily cytotoxic swelling.
• D. Vasogenic edema is unrelated to blood-brain barrier disruption.

Answer: (A)

Vasogenic edema occurs when the blood-brain barrier is disrupted, allowing plasma proteins and fluid to leak from capillaries into the extracellular space. This creates extracellular accumulation of fluid, especially in white matter, and is driven by the movement of large molecules into the brain tissue. That’s why the statement describing leakage of large molecules from capillaries into the extracellular space best captures the mechanism. In contrast, cytotoxic edema is cellular swelling from energy failure that damages cell membranes and pumps, causing fluid to accumulate inside brain cells rather than in the extracellular space. Hydrocephalus involves excess CSF and increased intracranial pressure, not the specific BBB leakage pattern of vasogenic edema. And vasogenic edema is indeed linked to BBB disruption, so saying it’s unrelated to BBB disruption would be incorrect.

Vasogenic edema occurs when the blood-brain barrier is disrupted, allowing plasma proteins and fluid to leak from capillaries into the extracellular space. This creates extracellular accumulation of fluid, especially in white matter, and is driven by the movement of large molecules into the brain tissue. That’s why the statement describing leakage of large molecules from capillaries into the extracellular space best captures the mechanism.

In contrast, cytotoxic edema is cellular swelling from energy failure that damages cell membranes and pumps, causing fluid to accumulate inside brain cells rather than in the extracellular space. Hydrocephalus involves excess CSF and increased intracranial pressure, not the specific BBB leakage pattern of vasogenic edema. And vasogenic edema is indeed linked to BBB disruption, so saying it’s unrelated to BBB disruption would be incorrect.