Bilateral Perisylvian Polymicrogyria

  • Etiology: abnormal cortical organization secondary to ischemic laminar necrosis of 5th cortical layer after 20 weeks gestation, may be caused by in-utero cytomegalovirus, ischemia, or genetic
  • Imaging: small haphazard gyri which can’t be named by textbook (gyri of lissencephaly can be named by textbook though simplified), too few sulci, anomalous venous drainage

Cases of Bilateral Perisylvian Polymicrogyria