Book excerpt: Only with the advent of computed tomography and magnetic resonance imaging have radiologists become familiar with this uncommon pathology. The emphasis here is on MRI, as it guarantees the most accurate diagnosis of soft tissue tumours. Because of their rarity, multi-centric studies are necessary to collect statistically relevant numbers of these tumours and so assess the value of new imaging techniques in their detection, staging, grading, tissue characterisation, and post-treatment follow-up. This is a reflection of the work of a prestigious European study group of more than 30 such co-investigators - including experts on medical imaging - who collected more than 800 documented and histologically proven cases of soft tissue tumours. For each tumour type, 10-12 cases are shown, supported by 3-4 photos. Unsurpassed in its collection of case studies.