Since the original identification of<unk> , the number of findings has expanded to the point that the syndrome is associated with a considerable constellation of abnormalities. The abnormalities may occur in a variety of combinations, and need not include all three aspects of the classic triad of sebaceous nevus, seizures and mental retardation. In 1998, a literature review by van de Warrenburg et al. found: * seizures in 67% of cases * mental retardation in 61% of cases * ophthalmological abnormalities in 59% of cases * involvement of other organ systems in 61% of cases * structural abnormality of cerebrum or cranium in 72% of cases The major neurological abnormalities include mental retardation to varying extent, seizures, and hemiparesis. Seizures, when present, typically begin during the first year of life. The most common structural central nervous system abnormalities in<unk>  are hemimegalencephaly and ipselateral gyral malformations. The major ocular abnormalities are colobomas and choristomas. Skeletal abnormalities may include dental irregularities, scoliosis, vitamin D-resistant rickets and hypophosphatemia. Cardiovascular abnormalities include ventricular septal defect and coarctation of the aorta; urinary system issues include horseshoe kidney and duplicated urinary collection system.
Schimmelpenning syndrome
Leschke syndrome
Hapnes Boman Skeie syndrome
Galloway Mowat syndrome
Eiken syndrome
Zechi-Ceide syndrome
Cohen-Gibson syndrome
Antley–Bixler syndrome