Cancer Cluster Designation
The official, statistically validated finding by a public health authority (such as the CDC or a state health department) that an area's cancer rates exceed expectations and warrant deeper investigation.
Related terms
Cancer Cluster A greater-than-expected number of cancer cases occurring within a specific group of people in a defined geographic area over a certain period. The CDC's official designation requires intense, long-term statistical analysis. Observed vs. Expected Rates An epidemiological method of comparing the actual (observed) number of disease cases in a community against the number that would be expected based on state or national averages. A statistically significant gap suggests an environmental cause. Statistically Significant A finding mathematically unlikely to be the result of random chance or coincidence. Used to confirm that a pattern—like a disease cluster—is real and not just noise in the data.