Oral 3.01: Malignant thymoma incidence in a Chinese population.

Background Malignant thymoma is a rare malignancy of unknown etiology. Few population-based studies have described the patterns of the incidence. The object of the study is to describe the incidence of malignant thymoma and its trend in Shanghai, a representative sample of Chinese urban population, to provide basic information on the future clinical and prevention research.