Isolated encephalocele

A rare, neural tube closure defect characterized by partial lacking of bone fusion, resulting in sac-like protrusions of the brain and the membranes that cover it through the openings in the skull. Protruding tissue may be located on any part of the head, but most often affects the occipital area. Depending in the size and location, encephalocele are often associated with neurological problems including intellectual disability, seizures, vision impairment, ataxia, and hydrocephalus.