A cavity within the cerebral hemisphere, filled with cerebrospinal fluid, that communicates directly with the ventricular system.
Comment:
Porencephaly is usually the result of damage from stroke or infection after birth, but may also be the result of a developmental defect. Porencephaly is often associated with various ophthalmic and neurologic signs, including visual-field defects, abnormal pupillary responses, optic nerve hypoplasia, decreased vision, nystagmus, strabismus, hemi-inattention, seizures, and mental deficiencies.