The invention relates to a method for quantitatively analyzing tumor cells in a body fluid. According to the inventive method, the test sample to be examined is first subjected to a method for accumulating or depleting tumor cells, and a reaction is carried out on the accumulated or depleted tumor cells....http://www.google.de/patents/US6821726?utm_source=gb-gplus-sharePatent US6821726 - Method for quantitatively analyzing tumor cells in a body fluid and test kits suited therefor