Schneeberg lung disease and uranium mining in the Saxon Ore Mountains (Erzgebirge).

The so-called Schneeberg lung disease is a form of bronchial or alveolar carcinoma caused by the effects of the radioactive gas radon and of its radioactive short half-life daughter products. This type of radiation-induced occupational cancer is the most common and the most important radiation injury among workers occupationally exposed to ionizing radiation. There have been many deaths from lung cancer, especially in the Soviet uranium mines in the Erzgebirge of Saxony in the former German Democratic Republic. The history of disease in these miners extends over five centuries; the first observations of their health hazard start in the Middle Ages. The discovery of the lung cancer component was made toward the end of the nineteenth century, and the suspicion that a connection might exist between this cancer type and exposure to ionizing radiation was voiced at the beginning of the twentieth century. In the first half of this century, further research was carried out on this disease in the Schneeberg area of the Erzgebirge. Before the end of World War II, guidelines were set up to define the acceptable limits of radon exposure in the ore mines of Saxony. After World War II, the American uranium mines in the Colorado Plateau used the German research results as a basis for working out their own radiation protection standard. The uranium mines under Soviet occupation in the former GDR, on the contrary, paid no attention to these research findings. For many years, no precautions were taken for the miners' working conditions. The consequence of this serious omission was an estimated 9,000 fatal cases of lung cancer among these underground miners. High concentrations of radon are to be found in indoor air of homes in some districts of the Erzgebirge, suggesting an increasing lung cancer risk for the local inhabitants. The significance of this finding is evaluated.