<P>In the age of the World Wide Web informed patients continue to surprise oncologists with detailed questions about popular tumor therapies. Although minimally invasive tumor therapies (MITT) have become daily clinical practice for palliative treatment of liver tumors the acceptance of these palliative modalities still varies enormously. In addition promising results have been published for in situ ablation of lung metastases bone tumors and renal cell carcinoma. This book gives an up-to-date overview of the popular techniques and clinical results of MITT with a clarification of the actual indications including the size tumor entities and clinical benefits. Moreover the book focuses on the prospects and limitations of imaging methods - ultrasound computed tomography and magnetic resonance imaging - used for MITT.</P>