Definition of Progeria:

Progeria is a disease that produces rapid aging, beginning in childhood.

Causes, incidence, and risk factors:

Progeria is a rare condition that is remarkable because its symptoms strongly resemble normal human aging, but occur in young children.

Ninety percent of children with progeria have a mutation on the gene that encodes the protein lamin A. Progeria usually occurs without cause. It is not seen in siblings of affected children, although -- in very rare circumstances -- more than one child in a family can have the condition.