This is a list of cancer clusters. A cancer cluster is a statistical event, which may or may not have a cause other than chance. There are other cancer clusters that occur without any obvious source of carcinogens.

{| class="wikitable"

|-

! colspan="6" style="font-size: 120%;" | North America

|-

!Date

!Disease

!Location

!Number of cases

!Cause

!References

|-

| align="center" | 1917–1927

| Osteosarcoma

| New Jersey, Connecticut, Illinois

| align="center" | 86

| Radium

|

|-

| align="center" | 1990–2005

| Leukemia

| Elbmarsch, Lower Saxony and Krümmel (Kruemmel), Geesthacht, Schleswig-Holstein in Germany

| align="center" | 16

| Unknown<br />Speculated to be actinide, especially plutonium-241 of unknown origin that was found in the area or tritium from a nearby nuclear power plant

|

  • List of known cancer clusters in the U.S.A.