Absence of the Septum Pellucidum
The septum pellucidum (SP) is a thin membrane located at the midline of the brain. Children who are born without this membraine and also have other abnormalities--pituitary deficiencies and abnormal development of the optic disk--have a disorder known as septo-optic dysplasia. More information about this condition can be located at the NINDS Septo-Optic Dysplasia Information Page.
Absence of the SP alone is not a disorder but is instead a characteristic noted in children with septo-optic dysplasia.
The absence of the septum pellucidum alone is not a disorder. However, when it is part of septo-optic dysplasia the prognosis varies according to the presence and severity of associated symptoms.
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March of Dimes
Works to improve the health of babies by preventing birth defects and infant mortality through programs of research, community services, education, and advocacy.
National Organization for Rare Disorders (NORD)
Federation of voluntary health organizations dedicated to helping people with rare "orphan" diseases and assisting the organizations that serve them. Committed to the identification, treatment, and cure of rare disorders through programs of education, advocacy, research, and service.