The Veterans Affairs Central Cancer Registry (VACCR) receives and stores information on cancer diagnosis and treatment constraints compiled and sent in by the local cancer registry staff at each of the 132 Veterans Affairs Medical Centers that diagnose and/or treat Veterans with cancer. The information sent is encoded to meet the site-specific requirements for registry inclusion as established by several oversight bodies, including the North American Association of Central Cancer Registries, the American College of Surgeons' Commission on Cancer, and the American Joint Commission on Cancer, among others. The information is obtained from a wide variety of medical record documents at the local medical center pertaining to each Veterans Health Administration (VHA) cancer patient. The information is then transmitted to the VACCR. Details collected include extensive demographics, cancer identification, extent of disease and staging, first course of treatment, and outcomes. Data extraction is available to researchers with VA approved Institutional Review Board studies, peer review, and Data Use Agreements.