Connatal Cyst

• Etiology: Congenital normal variant
• Imaging:
  — Round cyst less than 1 centimeter in diameter located at superolateral angle of frontal horns of lateral ventricles
  — Can be bilateral
  — Can be multiple and look like a string of pearls
• DDX: On coronal images key landmark is superolateral angle of frontal horns of lateral ventricles: connatal cysts are located at angle, subependymal cysts are located below angle and periventricular leukomalacia is located above angle
• Complications: None
• Treatment: None
• Clinical: In 1% of pregnancies

Radiology Cases of Connatal Cyst