Sputum Cytometry Analysis in Lung Cancer Screening After Professional Asbestos Exposure

Interest of Morphometric Analysis of Sputum Cytology for Lung Cancer Screening in Workers Highly Exposed to Asbestos - Exploratory Analysis of Biomarkers Predictive for Lung Cancer

Workers exposed to asbestos are at high risk of lung cancer. Medical follow-up of this population relies on repeated CT-scans which are more accurate for detection of peripheral lesions, and expose to X-rays and to risk of false-positives. Analysis of sputum using automate cytometry may be of interest in this population, alone or in combination with CT-scan.

An ancillary study will evaluate the interest of blood predictive biomarkers.

Inclusion Criteria:

• High professional asbestos exposure
• Member of a former cohort recruited between 2000 and 2006 in Caen, Rouen and Le Havre (inclusion criteria: 50-75 years at the time of initial recruitment, high intermittent asbestos exposure >= 1 year, or high discontinuous asbestos exposure >=10 years). All the living members of the cohort will be contacted: a maximum of 1000 subjects is expected, probably less.
• Informed consent signed

Exclusion Criteria:

• Personal history of lung cancer
• Refusal of the study protocol
• Uncontrolled asthma or lung failure