The purpose is to evaluate feasibility of medical supervision of professionally active asymptomatic wood workers with questionnaires and nasofibroscopy.

Secondary purposes are:

• Feasibility evaluation of identification of former and actual professional expositions to wood dust and to various naso-sinusal carcinogenics in case of co-expositions (formaldehyde, chrome, nickel, leather)
• Description of abnormal symptoms identified by occupational doctor and needing an otorhinolaryngology test
• Description of results and examinations induced by nasofibroscopy in symptomatic or asymptomatic individuals: counting of naso-sinusal adenocarcinoma cases
• Evaluation of participation of workers retiring in 2 years after inclusion to medical supervision program
• Evaluation of information flow among different players
• Assessment of costs induced by this targeted screening: direct medical costs (screened pathologies, induced additional examinations…) and indirect costs for company (duration of worker absence for transfer, medical and additional examinations).

Inclusion Criteria:

• Employee or craftsman
• Actual or former professional exposition to wood dust
• Onset of exposition to wood dust back to more than 30 years (latency >30 years)
• Cumulated exposition to wood dust longer than 12 months
• Exposition to wood dust during machining tasks (sawing, milling, planing, drilling, bridging) or all documented activities exposing to wood dust concentration > 1 mg/m3 for 8 hours
• Worker followed by occupational doctor of participant occupational health departments
• Worker accepting medico-professional supervision recommended by guidelines
• Affiliation to social security

Exclusion Criteria:

• Difficulty with comprehension of wood auto-questionnaire

Population under analysis consists of all workers seen in occupational health consultation and exposed to wood dust at least for cumulated 12 months and with first exposition back to more than 30 years