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Early lung cancer action project: initial findings on repeat screenings
C I Henschke1, D P Naidich, D F Yankelevitz
1Weill Medical College of Cornell University, New York, New York, USA. chensch@med.cornell.edu
Cancer
|July 10, 2001
Summary
Annual computed tomography (CT) screening for lung cancer is effective, with few false positives. Early detection through repeat CT screenings allows for diagnosis at more curable stages.
Area of Science:
- Pulmonology
- Oncology
- Radiology
Background:
- The Early Lung Cancer Action Project (ELCAP) aimed to assess the utility of annual computed tomography (CT) screening for lung cancer.
- This study focused on the initial findings from repeat screening rounds following the baseline results.
Purpose of the Study:
- To evaluate the effectiveness of annual computed tomography (CT) screening in detecting lung carcinoma.
- To analyze the early results of repeat CT screenings in high-risk individuals.
Main Methods:
- A cohort of 1000 high-risk individuals underwent baseline and annual CT screenings.
- A positive screening result was defined by newly detected pulmonary nodules with interim growth.
- Diagnostic workup followed ELCAP investigator recommendations.
Main Results:
- Out of 1184 repeat screenings, 30 (2.5%) were positive. Of these, 7 malignancies were diagnosed after nodule growth, with 6 non-small cell and 1 small cell carcinoma.
- Two additional lung cancers were diagnosed symptomatically, neither associated with nodules.
- False-positive screening results were uncommon and generally manageable without invasive procedures.
Conclusions:
- Annual CT screening is effective in detecting lung cancer at earlier, more treatable stages.
- False-positive results are infrequent and manageable.
- Repeat CT screenings help minimize interim diagnoses of lung cancer.