There is no one reason for this gap, according to Jamie Studts, a professor of medical oncology at the University of Colorado Anschutz Medical Campus School of Medicine. Part of the low rate may be that determining lung cancer screening eligibility can be difficult for overworked primary care providers, unlike other cancer screenings that have simple age-based criteria. The gap may also be related to the stigma and fatalism around lung cancer, as patients often think they will be blamed for having the disease and will not survive anyway.