Metastases form in distant organs (IMAGE) ETH Zurich Caption Seeds only germinate on fertile soil. Similarly, disseminating tumour cells only form metastases in distant organs when the right conditions are met. Credit Visualisation: ETH Zurich / Alice Casale Usage Restrictions For editorial, non-commercial use only! License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.