Septooptic dysplasia (SOD) is a clinically heterogeneous disorder characterized by the classical triad of optic nerve hypoplasia, pituitary hormone abnormalities and midline brain defects. The disease is MONDO_0008428 (septooptic dysplasia). Also known as: De Morsier syndrome, SOD, septo-optic dysplasia, septo-optic dysplasia sequence.