Which statement correctly describes parenchymal neurocysticercosis?

Which statement correctly describes parenchymal neurocysticercosis?

• A. It involves cysticerci within brain tissue
• B. It involves cysticerci only in the spinal cord
• C. It affects muscles predominantly
• D. It is synonymous with schistosomiasis

Answer: (A)

Parenchymal neurocysticercosis means the cysticerci are literally embedded in the brain’s own tissue, the parenchyma. This localization to brain tissue distinguishes it from cysts that are in the ventricular spaces or in the meninges, and from non-neural sites. The infection starts when Taenia solium eggs are swallowed, larvae travel through the bloodstream, and cysticerci settle in brain parenchyma. Viable parenchymal cysts can be asymptomatic, but as they degenerate they provoke inflammation, edema, and seizures—one of the most common presentations. So describing cysticerci within brain tissue accurately captures the parenchymal form. Involvement of the spinal cord would be a different location, muscle involvement is non-neural, and schistosomiasis is caused by a different parasite with a distinct disease profile.

Parenchymal neurocysticercosis means the cysticerci are literally embedded in the brain’s own tissue, the parenchyma. This localization to brain tissue distinguishes it from cysts that are in the ventricular spaces or in the meninges, and from non-neural sites. The infection starts when Taenia solium eggs are swallowed, larvae travel through the bloodstream, and cysticerci settle in brain parenchyma. Viable parenchymal cysts can be asymptomatic, but as they degenerate they provoke inflammation, edema, and seizures—one of the most common presentations.

So describing cysticerci within brain tissue accurately captures the parenchymal form. Involvement of the spinal cord would be a different location, muscle involvement is non-neural, and schistosomiasis is caused by a different parasite with a distinct disease profile.