A method for marking a surgically formed cavity in a patient includes providing an implant comprising a matrix material and a marking material, the matrix material configured to be elastically compressible modifying the shape and size of the implant to fit the shape and size of the surgically formed cavity in the patient, the implant being configured to fill the surgically formed cavity and support tissue surrounding the surgically formed cavity and to allow in-growth of fibrous tissue into and replace at least a portion of the matrix material and inserting the implant into the surgically formed cavity.
