Key Points

• No new cases of leukemia diagnosed in children between 2020 and 2022 in the monitored areas

• A decrease in incidence that is not statistically different from the national incidence over the 2017–2022 period

• Strengthening of the main hypothesis regarding the cluster’s occurrence: a random fluctuation in the number of cases without a localized common risk factor

• Discontinuation of epidemiological monitoring in the identified areas, with continued national surveillance of pediatric cancers provided by the National Registry of Childhood Cancers