[Traveler's thrombosis].

Travel induced disorders have become more and more evident in a society of mass tourism. The link between travel in sitting position and risk of venous thromboembolic disease has been widely accepted. But the risk is not quantifiable because of a lack of epidemiological and pathophysiological data. It is likely to be small and mainly effect passengers with additional risk factors for venous thromboembolism. Therefore, prophylaxis of thromboembolic events during long distance journeys can only be considered good advice (with the exception of leg exercise) instead of an evidence-based recommendation.