Diagnosis of a primary malignant bone tumour is based on clinical and radiological findings, with biopsy providing a definitive diagnosis. The two main malignant bone tumors are osteosarcoma in children and chondrosarcoma in adults. Radiographic signs may immediately be highly suggestive of malignancy. MRI is the second-line examination for assessing locoregional extension within the bone and adjacent soft tissues, detecting skip metastases and determining the most appropriate area for biopsy. Because of its radiation-intense nature, CT scans are increasingly being replaced by MRI.This pedagogical and didactic book provides a radiological description of the various malignant tumors, richly illustrated with numerous demonstrative diagrams. The book is intended for radiology interns and practicing physicians.