Background: The Will Rogers phenomenon occurs when newer technology allows for more sensitive detection of tumor spread, resulting in stage migration and an apparent improvement in patient survival. We investigated whether use of highly sensitive positron emission tomography (PET) scanning in non-small cell lung cancer has had this effect.
Methods:We performed a retrospective analysis involving 12 395 patients with non-small cell lung cancer in the pre- PET (1994PET ( -1998 and PET (1999PET ( -2004 periods. Interperiod differences in staging procedures, clinical variables, and patient survival were evaluated.Results: There was a 5.4% decline in the number of patients with stage III disease and an 8.4% increase in the