Background: World Trade Center (WTC) rescue and recovery workers were exposed to a complex mix of pollutants and carcinogens.
Objective: The purpose of this investigation was to evaluate cancer incidence in responders during the first 7 years after 11 September 2001.
Methods: Cancers among 20,984 consented participants in the WTC Health Program were identified through linkage to state tumor registries in New York, New Jersey, Connecticut, and Pennsylvania.