Porencephaly is due to –
**Core Concept**
Porencephaly refers to a rare congenital or acquired disorder characterized by the presence of a cystic cavity or cysts within the brain parenchyma. This condition involves the destruction of brain tissue, leading to the formation of a fluid-filled cavity.
**Why the Correct Answer is Right**
Porencephaly is primarily caused by the disruption of the blood-brain barrier, allowing cerebrospinal fluid (CSF) to leak into the surrounding brain tissue, resulting in cyst formation. This disruption can occur due to various factors, including congenital defects, infections, or traumatic injuries.
* **Option A:** **Intracranial hemorrhage** is not a primary cause of porencephaly, although it can be a contributing factor in some cases.
* **Option B:** **Viral encephalitis** is a possible cause of porencephaly, but it is not the most common or direct cause of this condition.
* **Option C:** **Meningitis** can be a contributing factor to porencephaly, particularly if it leads to brain tissue destruction and cyst formation.
**Clinical Pearl / High-Yield Fact**
A key clinical feature of porencephaly is the presence of a cystic cavity or cavities within the brain parenchyma, which can be visualized using imaging techniques such as MRI or CT scans.
**Correct Answer:** C.