Who should be screened for colorectal cancer and when, how colonoscopy, stool tests and other options compare, follow-up after a positive result, and coverage.

Who qualifies for yearly low-dose CT lung cancer screening, how to count pack-years, what false positives mean, and why quitting smoking still matters most.

U.S. cervical cancer screening schedules by age, how Pap and HPV tests differ, self-collection, when screening can stop, and how the HPV vaccine fits in.

Why mammograms are now advised every two years from 40 to 74, what dense breast notices mean, 3D mammography, call-backs and higher-risk screening.