What is the definition of a cancer cluster?
According to the Centers for Disease Control and Prevention (CDC), a cancer cluster is defined as a greater than expected number of cancer diagnoses that occurs within a group of people, in a geographic area, or over a period of time. In other words, the pattern of cancer appears unusual. A person may suspect that a cancer cluster exists when several loved ones, neighbors, or coworkers are diagnosed with cancer. However, what appears to be a cluster may actually reflect the expected number of cancer diagnoses within the group or area.
