Soft tissue tumors are a rare pathology and until the advent of computed tomography and magnetic resonance imaging, radiologists were not familiar with this uncommon pathology. Because of their rarity, multicentric studies are necessary to collect statistically relevant numbers of tumors and to assess the value of new imaging modalities in detection, staging, grading, tissue characterization, and posttreatment follow-up of soft tissue tumors. MRI potentials are most promising due to the highest contrast resolution and multiplanar capabilites of the method. This book is the reflection of the work of a multicentric European Study Group of more than 30 co-investigators which collected more than 800 cases of soft tissue tumors. Experts on medical imaging and co-investigators contributed to the realisation of this book