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There is therefore a considerable mobility of occupational health physicians, which interfered with follow-up despite their good mobilization and a high percentage of employee are lost to follow-up after having left their jobs. More appropriate systems must be set up to follow populations of employees, such as new collaborations with general practitioners.

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Disponible en ligne sur www.sciencedirect.com SummaryPurpose of the study. A six-year study on ethmoid cancer in employees exposed to wood dust was initiated in 2006 by three Occupational Health Services in Maine-et-Loire, France. The protocol, established with the help of ENT specialists from private and public sectors (University Hospital of Angers), was approved by the People's Protection Committee and the National Computing and Freedom Committee (Commission nationale de l'informatique et des libertés : CNIL). The study began in 2007.We present the interim results after 2.5 years. The main objective of the study was to evaluate the advantage of systematic nasofibroscopy every 2 years compared to the sole use of specific questionnaires for employees and ex-employees exposed to wood dust for over 20 years. The secondary objectives of the study were to inform the employees of the risks of wood dust, promote a post-professional follow-up, and evaluate the feasibility of a systematic two-year ENT follow-up. Patients and methods. Employees and ex-employees exposed to wood dust for over 20 years were screened, on one hand, solely by means of an annual, oriented questionnaire proposed by the occupational physician, and, on the other, by an additional ENT consultation with a nasofibroscopy every 2 years. The study was longitudinal and the variables analyzed were: professional exposure, tobacco smoking, clinical signs suggesting ethmoid cancer, results of nasofibroscopy, and complementary examinations, such as CT scans, MRI, and biopsies.