Correct answer: Encephalocele. A developmental disorder of the central nervous system, in which the meninges and brain herniate in the neck, or between the forehead and the nose. It occurs in about 3 / 10.000 births and can be corrected surgically. When the bulging material consists of primarily cerebrospinal fluid, a complete recovery can occur. When a large amount of brain tissue is present in the encephaloceles, there is a higher chance of perioperative complication.