[The problem of occupational cancer in cancer of the nose and the nasal sinuses in patients exposed to sawdust].

The results of a cross-sectional study carried out in seven districts of the GDR and Berlin, capital of the GDR, show a significantly increased number of tumors in male woodworkers. Compared to 13 expected tumors the number of those observed amounted to 62. The most frequent localisation was the ethmoidal sinus; adenocarcinomas dominated histologically.

[Lung cancer and smoking (author's transl)].

In all countries from which reliable statistics are available, there has been a striking increase in lung cancer mortality in recent decades. At present lung tumours are the most frequent organ cancer in men. Epidemiological, clinical and laboratory studies have clearly shown that the inhalation of cigarette smoke is a major risk factor in lung cancer.

[Experimental study on cancerogenic activity of asbestos filters (author's transl)].

Wistar rats evolved many malignant tumors of different localisation. The tumors grew in the time of 8-14 months after oral application of asbestos filters which contained 53% Chrysotile asbestos. The number of tumors was statistically significant different not only in comparison to a control group which got talc only, but also to an untreated control group.

[Exerimental study on cancerogenic activity of Propanol-1, 2-Methylpropanol-1 and 3-Methylbutanol-1 (author's transl)].

By using Propanol-1, 2-Methylpropanol-1 cancerogenic, hepatotoxic and haematotoxic effects could pointed out by an experimental study with rats. These high alcoholics are frequently used in the chemical industry but they are also essential parts of most of the alcoholic beverages. It is recommended to define safety limit.