The Central Cancer Registry (CCR) collects, processes, and analyzes data on all cancer cases diagnosed among North Carolina residents. All health care providers are required by law to report cases to the CCR (as in nearly all other states), but the primary data source is the hospitals of the state. The CCR supplements hospital data with reports from physicians who diagnose cases that are not seen in a hospital. Death certificates and pathology laboratory reports are used to help identify cases that are missed in the routine reporting. Duplicate reports are consolidated in the data editing process. This is primarily a cancer surveillance activity, monitoring the incidence of cancer among the various populations of the state.