Researchers have found that unexpected findings on lung cancer CT scans can reveal other hidden cancers. By analyzing data from over 26,000 participants in the National Lung Screening Trial, the team identified non-lung abnormalities that may signal undiagnosed cancers and need prompt follow-up.
The study showed that about 3% of scans revealed issues in organs like the kidneys, liver, and lymph nodes. These “extrapulmonary” findings were linked to a higher risk of developing other cancers within a year, particularly urinary system cancers (kidney and bladder) and blood cancers (lymphoma and leukemia). This helps doctors distinguish between harmless anomalies and early warning signs of serious disease.
By highlighting which incidental findings are most likely to be malignant, the research can guide more precise follow-up care and reduce unnecessary tests. The team plans to study whether these patterns hold in everyday hospital settings, aiming to standardize how unexpected scan findings are handled as lung cancer screening becomes more common nationwide.