Subjects will be identified by diagnosis and procedure codes from a university surgical practice and the St. John Medical Center Cancer Registry. Data will be obtained by review of both the clinic and hospital charts. In addition we plan to review and utilize liver tumor treatment and outcomes data from a national database. Treatment decisions, in cases managed by the primary investigator, were made on a clinical basis, often in collaboration with an interventional radiologist. Of the patients managed by the principal investigator, all procedures were undertaken after an informed consent process. Subjects were not exposed to risk beyond that posed by the recommended treatment. All treatments were within the scope of standard medical care. The primary investigator has no knowledge of the treatments chosen for the patients he did not manage. The subject's referring physician may be contacted to obtain follow-up data on the subject. The follow-up data will include: is the patient alive with disease; alive without disease, alive unknown; dead free of disease; dead with disease; dead unknown.