Grading of oligodendrogliomas: correlation of neuroradiology and proliferation index

The results of neuroradiological grading of 30 oligodendrogliomas were correlated to conventional histology and a proliferation index, which was determined by the monoclonal antibody Ki-67. A good correspondence of neuroradiological criteria and the proliferation index was given in 90% of the cases and demonstrates the value of the radiological method, to detect early stages of malignant transformation. Disagreement between neuroradiology and conventional histology could be observed more frequently than differences from the grading made by Ki-67-values.