Final answer:
Yes, a 58-year-old with a significant smoking history should be screened for lung cancer, considering the high risk associated even after cessation.
Step-by-step explanation:
A 58-year-old male with a 20-pack-year smoking history who quit 1 year ago should indeed be screened for lung cancer. Smoking significantly increases the risk of lung cancer, and the effects can manifest even decades after smoking commences. Despite quitting a year ago, his extensive history of smoking still puts him at a higher risk for developing cancer. Current guidelines suggest that lung cancer screening is recommended for individuals aged 50 to 80 years who have a 20 pack-year smoking history and currently smoke or have quit within the past 15 years.