[Contribution to aetiology by the primary pulmonary sarcoma in comparison to the pulmonary carcinoma (author's transl)].

On 41 primary pulmonary sarcomas in the years 1957 till 1974 and on 192 pulmonary carcinomas in the year 1969 cancerogene noxes and endogene factors were analysed, compared and discussed with literature. Smoking of cigarettes, chronic bronchitis and radioactive radiation at underground mining are also significantly accumulated in our study and are recognized as cancerogenes. There is no correlation between pulmonary sarcomas and these exogene factors. The constant frequency in the last decades, the non-existing sex disposition, the ten till fifteen years lower sarcoma manifestation with a continuous increase already in the second decade of life and the protected position of the mesenchyme do not suggest a causal connexion between exogene cancerogene influence and pulmonary sarcoma formation. Rather make us suppose an endogene tumour disposition. Pulmonary sarcomas correlate as to localisation, sex relation and not provable exogene cancerogena with the adenocarcinoma of the lungs. The causal connexion between trauma and sarcoma formation in a thoracotomy cicatrice as well as the possibility of a sarcomatous degeneration are discussed.