<unk>  is a rare genetic malformation syndrome characterized by the partial or complete absence of a key structure in the brain called the corpus callosum, the presence of retinal abnormalities, and seizures in the form of infantile spasms.<unk>  is theorized to be caused by a defect on the X chromosome as it has thus far only been observed in girls or in boys with Klinefelter syndrome. Confirmation of this theory awaits the discovery of a causative gene. Symptoms typically appear before a baby reaches about 5 months of age.
Aicardi syndrome
Brugada syndrome
Pacak–Zhuang syndrome
Long QT syndrome
Sudden arrhythmic death syndrome
Wooden chest syndrome
Libman–Sacks endocarditis
Familial aortic dissection