[Radiomorphologic classification of central chondrosarcomas].
A retrospective study of 50 exostotic chondrosarcomas of the trunk reveals statistically significant correlations of histological grading and growth pattern as well as bone destruction pattern as general hallmarks of the degree of malignancy. No correlation between presence and type of matrix mineralisations was found. A radiomorphological classification derived from the CT appearance of mineralisations allows a distinction of 5 types that are important for diagnostic specificity and recurrence detection. MRI provides sensitive detection of early local recurrences due to high-contrast display of chondroid tissue irrespective of mineralisations. However, the specificity is low.