Suspicion of developing bone neoplastic process requires carrying out precise imagining diagnostics. Intentional, well planned examinations should provide information if the change is initial or malignant, single or multiple, if distant metastases are present and what place is the best for biopsy? Radiological features on RTG images, allowing diagnosis of initial or malignant bone tumour, were analysed. Suspicion of malignant process requires extension of imagining diagnostics of CT and MR studies to accurately estimate location of primary focus: evaluation of tumour size, character of its growth (initial, malignant), attitude to ambient soft tissues and vascular-nervous fasciculi passing in vicinity. Evaluation of degree of progression that is detection of metastatic focuses requires performing CT examinations of the chest, scintiscanning of skeletal system, USG of abdominal cavity and other regions. Treatment of initial tumours is operative, and in case of malignant ones the treatment is comprehensive. Foundation of successful treatment is radical resection of tumour mass with remaining appropriate margin of healthy tissue. The base of success is early diagnosis, because with small mass of the tumour there are the best operative conditions and the risk of formation of distant metastases decreases.