Is Russell-Silver syndrome inherited ?
Is Russell-Silver syndrome inherited? Most cases of Russell-Silver syndrome (RSS) are sporadic (not inherited), which means they occur in people with no family history of RSS. Less commonly, Russell-Silver syndrome is inherited. In some families, it appears to be inherited in an autosomal dominant manner. This means that having one "copy" of a genetic change in each cell is enough to cause the disorder. In some cases, an affected person inherits the genetic change from a parent. In other cases, the change occurs for the first time in an affected person. When a person with a genetic change that causes an autosomal dominant condition has children, each child has a 50% (1 in 2) chance to inherit the genetic change. In other families, the condition is inherited in an autosomal recessive manner. This means that to be affected, a person must have a change in both copies of the responsible gene in each cell. Affected people inherit one copy from each parent, who is referred to as a carrier. Carriers of an autosomal recessive condition typically do not have any signs or symptoms (they are unaffected). When 2 carriers of an autosomal recessive condition have children, each child has a: 25% (1 in 4) chance to be affected 50% (1 in 2) chance to be an unaffected carrier like each parent 25% chance to be unaffected and not be a carrier