The cerebral cortex is absent; however, in most cases, the fetal head remains enlarged due to increased intracranial pressure, which results from inadequate reabsorption of the cerebrospinal fluid produced in the choroid plexus. Prognosis
There is no standard treatment for hydranencephaly. Treatment is symptomatic and supportive. An accompanying diagnosis of hydrocephalus may be treated with surgical insertion of a shunt; this often improves prognosis and quality of life.The prognosis for children with hydranencephaly is generally quite poor. Death often occurs within the first year of life, though many children live several years, or even into adulthood; in one reported case, a person with hydranencephaly lived until age 19. Occurrence
This condition affects under 1 in 10,000 births worldwide. Hydranencephaly is a rare disorder in the United States, which is defined as affecting fewer than 1 in 250,000. See also
Microhydranencephaly

References
External links
Hydranencephaly at NINDS
For men who are required to, or simply prefer to shave, studies show the optimal length to be about 0.5 mm to 1 mm to prevent the hair growing back into the skin. Using a beard trimmer at the lowest setting (0.5mm or 1mm) instead of shaving is an efficient alternative. The resulting faint stubble can be shaped using a standard electric razor on non-problematic areas (cheeks, lower neck).For most cases, completely avoiding shaving for three to four weeks allows all lesions to subside, and most extrafollicular hairs will resolve themselves within at least ten days. Permanent removal of the hair follicle is the only definitive treatment for PFB. Electrolysis is effective but limited by its slow pace, pain and expense. Laser-assisted hair removal is effective. There is a risk of skin discoloration and a very small risk of scarring.Some men use electric razors to control PFB. Those who use a razor should use a single blade or special wire-wrapped blade to avoid shaving too closely, with a new blade each shave. Shaving in the direction of hair growth every other day, rather than daily, may improve pseudofolliculitis barbae. If one must use a blade, softening the beard first with a hot, wet washcloth for five minutes or shave while showering in hot water can be helpful. Some use shaving powders (a kind of chemical depilatory) to avoid the irritation of using a blade. Barium sulfide-based depilatories are most efficient, but produce an unpleasant smell. Treatment
The simplest treatment for PFB is to let the beard grow.