A vertebral rod comprises a first elongated rod portion and a second elongated rod portion. A flexible intermediate portion is disposed between the first rod portion and the second rod portion. The intermediate portion includes a wall defining at least one cavity through a surface of the wall. The at least one cavity includes a first cavity portion disposed in a first plane and a second cavity portion disposed in a second plane transverse to the first plane. The at least one cavity defines a first tab having a free end. Methods of use are disclosed.
