<unk>  is a neural tube defect characterized by sac-like protrusions of the brain and the membranes that cover it through openings in the skull. These defects are caused by failure of the neural tube to close completely during fetal development.<unk> s cause a groove down the middle of the skull, or between the forehead and nose, or on the back side of the skull. The severity of<unk>  varies, depending on its location.
Encephalocele
Sialocele
Omphalocele
Subdural hygroma
Chorionic hematoma
Lateral meningocele syndrome
Cystic hygroma
Lipomeningomyelocele