Usually<unk> s are noticeable deformities and are diagnosed immediately after birth, but a small<unk>  in the nasal or forehead region can go undetected. Various physical and mental developmental delays can indicate the presence of<unk> s. Classifications<unk> s of the face are generally classified as nasofrontal, nasoethmoidal, or naso-orbital, however, there can be some overlap in the type of<unk> . They can also appear along any part of the cranial vault, as they result from abnormal closure of cranial bones; the most common location for<unk> s is the occipital region. If the bulging portion contains only cerebrospinal fluid and the overlying membrane, it may be called a meningocele. If brain tissue is present, it may be referred to as a meningoencephalocele. When the head size or occipitofrontal circumference is smaller than the herniating sac, then it is termed as giant<unk> . Separation of the neural and surface ectoderm causes apoptosis in the midline. A disturbance in this separation process at the final closure due to the lack of apoptosis is considered to be a critical aspect of nasofrontal and nasoethmoidal<unk> .
Encephalocele
Sialocele
Omphalocele
Subdural hygroma
Chorionic hematoma
Lateral meningocele syndrome
Cystic hygroma
Lipomeningomyelocele