[Growth and metastasis of malignant tumors].

The high life expectancy of today seems to be an important factor for the increasing frequency of malignant disease, which is observed nowadays: the patient lives long enough to develop cancer. Increased knowledge about growth and spread of malignant tumors allows a better understanding of tumor pathogenesis and is a prerequisite for differentiated and effective therapy. Besides it is necessary to improve the early detection rate of cancer and to select and control high risk groups.