TUMOROUS SPACE-OCCUPYING GROWTHS OF THE T IBIA - RADIOLOGICAL ANALYSIS OF 459 CASES

The patients' age, location and radiography of 459 bone tumours and tu mour-like lesions of the tibia were analysed retrospectively. 79.2% of all lesions were benign, and the portion of malignant tumours increas ed with increasing age. Predominantly malignant tumours were found in a distal central metadiaphyseal (100%), in a proximal central epimetad iaphyseal (90%) and in a proximal central metadiaphyseal (63%) locatio n. Lesions showing a growth rate according to Lodwick IA and those to IB were benign in 99.5 % and in 95.4%, respectively. In contrast, tumo urs showing a grade II or III were malignant in 85.2% and 100 % of cas es, respectively. Through the construction of subgroups by combination of patients' age, location and growth rate special tumours were selec ted in that way, that they were predominantly found in that subgroups.