Nasal encephaloceles are herniations of brain, meninges, and/or cerebrospinal fluid through a defect in the skull. They result from congenital fusion abnormalities at the nasal root. This picture and magnetic resonance image show a frontoethmoidal encephalocele in a young child. These defects are usually evident at birth, presenting as a skin-covered mass at the root of the nose (arrows).
