CHICAGO, Dec. 29 (Xinhua) -- Researchers at Washington University School of Medicine in St. Louis have shown in a study that Chiari 1 malformation, a common brain disorder, can be caused by variations in two genes involved in brain development.
To identify genes that cause Chiari 1 malformation, the researchers sequenced all the genes of 668 people with the condition, as well as 232 of their relatives. Of these relatives, 76 also had Chiari 1 malformation and 156 were unaffected.
