Frontal encephalocele

Frontal encephalocele is a rare congenital neural tube defect in which brain tissue and its surrounding membranes (meninges) protrude through a defect in the frontal bone of the skull. This condition is also known as frontal cephalocele or anterior encephalocele. It belongs to the broader category of encephaloceles, which are classified by their anatomical location. Frontal encephaloceles specifically involve the forehead region and may present as a visible soft tissue mass at or near the bridge of the nose, forehead, or between the eyes (nasofrontal, nasoethmoidal, or naso-orbital subtypes). The protruding sac may contain meninges alone (meningocele) or meninges along with brain tissue (encephalocele), and its size can vary considerably from small, barely noticeable swellings to large, disfiguring masses. The condition primarily affects the central nervous system and craniofacial structures. Key clinical features include a visible frontal or nasal mass present at birth, which may be covered by normal skin or a thin membrane. Patients may experience hypertelorism (widely spaced eyes), nasal deformity, visual disturbances, cerebrospinal fluid leakage, and varying degrees of neurological impairment depending on the amount of brain tissue involved. Some individuals may have associated hydrocephalus or other brain malformations. Intellectual disability and developmental delays can occur, particularly when significant brain tissue is herniated, though outcomes vary widely. Treatment is primarily surgical and involves repair of the skull defect and repositioning or removal of the herniated tissue. Surgical correction aims to protect the brain, restore normal craniofacial anatomy, and prevent complications such as infection (meningitis) or cerebrospinal fluid leaks. The timing and complexity of surgery depend on the size and contents of the encephalocele. A multidisciplinary approach involving neurosurgeons, craniofacial surgeons, ophthalmologists, and developmental specialists is typically required. Prognosis depends on the extent of brain involvement, associated anomalies, and the success of surgical intervention. Frontal encephaloceles generally carry a better prognosis than occipital encephaloceles, particularly when minimal brain tissue is involved.

Common questions about Frontal encephalocele