[Metastases of lung cancer within benign tumours (author's transl)]

Two cases of malignant tumours metastasizing to benign ones are presented. In one case a bronhial cancer of microcellular type has metastasized to a cavernous hemangioma of the pons cerebelli, and in the other case an anaplastic cancer of the lung was found to have metastasized to a liver adenoma. It is not clear wether such tumour metastases occur accidentally or certain special reasons are underlying. None of the existing hypotheses can explain that phenomenon sufficiently.