Cancer Cluster
A cancer cluster is defined as a greater-than-expected number of cancer cases that occurs within a group of people in a geographic area over a period of time. Check out About Cancer Clusters to learn more.
Local or state health departments, along with cancer registries, respond to cancer cluster questions and have the most current local data. If you suspect a cancer cluster in your community or workplace, or if you’d like information such as cancer statistics or trends in your area, first contact your local or state health department or state cancer registry.
When people contact CDC with concerns about a suspected cancer cluster, CDC provides general information about cancer clusters and refers them to the appropriate local or state health department or cancer registry. CDC also provides technical advice to states as requested and develops guidance for state, territorial, local, and tribal health departments on how to respond to cancer cluster concerns.