Hans-Jorg Senn H.-J. Senn ( ) Center for Tumor Detection and Prevention, Rorschacherstr. 150, CH-9006 St. Gallen, Switzerland Clinical oncology has centered mainly on developing new strategies and a multitude of new drugs for fighting relapsing and progressive cancer during the last two decades. Furthermore, it has done this with respectable success in quite a number of neoplastic diseases such as acute leukemias and sarcomas in pediatric patients and certain types of aggressive lymphomas, as well as se- lected solid tumors such as testicular cancer and choriocarcinoma in adult age....