Every year, thousands of Oregonians are diagnosed with cancer. The Oregon State Cancer Registry (OSCaR) was established, in August 1995, after the Oregon Legislature unanimously passed legislation making cancer a reportable disease. OSCaR is a statewide, population-based registry that collects and analyzes information about cancer cases occurring in Oregon. The ability to identify who is diagnosed statewide is important in the development of ways to prevent and control cancer.