Holoprosencephaly is a condition caused by the failure of embryonic forebrain, called prosencephalon. In this disorder the forebrain fails to divide into the double lobes of the cerebral hemisphere. As a result, the single-lobed brain structure is formed and severe skull and facial defects appear. In most of the cases, the malformations take a severe shape leading to the death of the child before birth. In some cases, the babies are born with less severe deformities and have normal or near-normal brain development and facial deformities that have an effect on the eyes, nose and upper lip.
Although there is not standard course of treatment for the disorder, but the treatment can be symptomatic and supportive.
The prognosis for holoprosencephaly depends on the severity of the brain and facial deformities.
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